📚 Free Healthcare Dictionary

Medical Dictionary

The MedSkillBuilder Medical Dictionary is a searchable healthcare vocabulary tool for nursing students, TEAS learners, allied health students, CBET learners, EMT learners, and early healthcare professionals.

Search terms by name, category, meaning, alias, clinical note, or memory trick. Each card is written in plain language so learners can recognize terms instead of just memorizing them.

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What This Dictionary Covers

This flagship build includes healthcare terms across ABGs, vital signs, lab values, anatomy, cardiology, respiratory care, renal function, infection, clinical skills, procedures, pharmacology, EKG, medical equipment, abbreviations, and medical word parts.

The page is designed to keep growing. New terms can be added over time while keeping the same searchable layout, filters, categories, and related MedSkillBuilder links.

ABG Abbreviations Anatomy Assessment Cardiology Conditions EKG Lab Values Medical Equipment Medical Word Parts Pharmacology Procedures Respiratory Vital Signs

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Medical Word Parts

-algia

Suffix meaning pain

A medical suffix that means pain. Example: myalgia means muscle pain.

Also known as: Suffix; myalgia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-algia = pain.
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Medical Word Parts

-asthenia

Suffix meaning weakness

A medical suffix that means weakness. Example: myasthenia means muscle weakness.

Also known as: Suffix; myasthenia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-asthenia = weakness.
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Medical Word Parts

-blast

Suffix meaning immature cell

A medical suffix that means immature cell. Example: osteoblast means bone-forming cell.

Also known as: Suffix; osteoblast

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-blast = immature cell.
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Medical Word Parts

-cele

Suffix meaning hernia or swelling

A medical suffix that means hernia or swelling. Example: cystocele means bladder herniation.

Also known as: Suffix; cystocele

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-cele = hernia or swelling.
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Medical Word Parts

-centesis

Suffix meaning surgical puncture

A medical suffix that means surgical puncture. Example: thoracentesis means puncture of chest space.

Also known as: Suffix; thoracentesis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-centesis = surgical puncture.
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Medical Word Parts

-clasis

Suffix meaning breaking

A medical suffix that means breaking. Example: osteoclasis means breaking bone.

Also known as: Suffix; osteoclasis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-clasis = breaking.
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Medical Word Parts

-cyte

Suffix meaning cell

A medical suffix that means cell. Example: leukocyte means white blood cell.

Also known as: Suffix; leukocyte

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-cyte = cell.
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Medical Word Parts

-desis

Suffix meaning binding or fixation

A medical suffix that means binding or fixation. Example: arthrodesis means joint fusion.

Also known as: Suffix; arthrodesis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-desis = binding or fixation.
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Medical Word Parts

-dynia

Suffix meaning pain

A medical suffix that means pain. Example: gastrodynia means stomach pain.

Also known as: Suffix; gastrodynia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-dynia = pain.
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Medical Word Parts

-ectomy

Suffix meaning surgical removal

A medical suffix that means surgical removal. Example: appendectomy means appendix removal.

Also known as: Suffix; appendectomy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-ectomy = surgical removal.
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Medical Word Parts

-emia

Suffix meaning blood condition

A medical suffix that means blood condition. Example: anemia means blood condition.

Also known as: Suffix; anemia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-emia = blood condition.
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Medical Word Parts

-genesis

Suffix meaning formation

A medical suffix that means formation. Example: pathogenesis means disease development.

Also known as: Suffix; pathogenesis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-genesis = formation.
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Medical Word Parts

-genic

Suffix meaning producing or caused by

A medical suffix that means producing or caused by. Example: iatrogenic means caused by treatment.

Also known as: Suffix; iatrogenic

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-genic = producing or caused by.
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Medical Word Parts

-gram

Suffix meaning record or image

A medical suffix that means record or image. Example: electrocardiogram means heart electrical record.

Also known as: Suffix; electrocardiogram

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-gram = record or image.
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Medical Word Parts

-graphy

Suffix meaning recording process

A medical suffix that means recording process. Example: radiography means imaging process.

Also known as: Suffix; radiography

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-graphy = recording process.
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Medical Word Parts

-iasis

Suffix meaning abnormal condition

A medical suffix that means abnormal condition. Example: cholelithiasis means gallstone condition.

Also known as: Suffix; cholelithiasis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-iasis = abnormal condition.
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Medical Word Parts

-itis

Suffix meaning inflammation

A medical suffix that means inflammation. Example: dermatitis means skin inflammation.

Also known as: Suffix; dermatitis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-itis = inflammation.
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Medical Word Parts

-logist

Suffix meaning specialist

A medical suffix that means specialist. Example: cardiologist means heart specialist.

Also known as: Suffix; cardiologist

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-logist = specialist.
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Medical Word Parts

-lysis

Suffix meaning breakdown or destruction

A medical suffix that means breakdown or destruction. Example: hemolysis means blood cell breakdown.

Also known as: Suffix; hemolysis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-lysis = breakdown or destruction.
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Medical Word Parts

-malacia

Suffix meaning softening

A medical suffix that means softening. Example: osteomalacia means softening of bone.

Also known as: Suffix; osteomalacia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-malacia = softening.
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Medical Word Parts

-mania

Suffix meaning obsessive condition

A medical suffix that means obsessive condition. Example: kleptomania means compulsive stealing.

Also known as: Suffix; kleptomania

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-mania = obsessive condition.
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Medical Word Parts

-megaly

Suffix meaning enlargement

A medical suffix that means enlargement. Example: cardiomegaly means enlarged heart.

Also known as: Suffix; cardiomegaly

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-megaly = enlargement.
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Medical Word Parts

-meter

Suffix meaning measuring instrument

A medical suffix that means measuring instrument. Example: spirometer means breathing measuring instrument.

Also known as: Suffix; spirometer

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-meter = measuring instrument.
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Medical Word Parts

-metry

Suffix meaning process of measuring

A medical suffix that means process of measuring. Example: spirometry means measurement of breathing.

Also known as: Suffix; spirometry

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-metry = process of measuring.
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Medical Word Parts

-oid

Suffix meaning resembling

A medical suffix that means resembling. Example: mucoid means resembling mucus.

Also known as: Suffix; mucoid

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-oid = resembling.
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Medical Word Parts

-oma

Suffix meaning mass or tumor

A medical suffix that means mass or tumor. Example: hematoma means collection of blood.

Also known as: Suffix; hematoma

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-oma = mass or tumor.
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Medical Word Parts

-osis

Suffix meaning abnormal condition

A medical suffix that means abnormal condition. Example: cyanosis means bluish discoloration condition.

Also known as: Suffix; cyanosis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-osis = abnormal condition.
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Medical Word Parts

-ostomy

Suffix meaning surgical opening

A medical suffix that means surgical opening. Example: colostomy means opening into colon.

Also known as: Suffix; colostomy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-ostomy = surgical opening.
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Medical Word Parts

-otomy

Suffix meaning cutting into

A medical suffix that means cutting into. Example: tracheotomy means cutting into trachea.

Also known as: Suffix; tracheotomy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-otomy = cutting into.
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Medical Word Parts

-paresis

Suffix meaning weakness

A medical suffix that means weakness. Example: hemiparesis means weakness on one side.

Also known as: Suffix; hemiparesis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-paresis = weakness.
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Medical Word Parts

-pathy

Suffix meaning disease or disorder

A medical suffix that means disease or disorder. Example: neuropathy means nerve disorder.

Also known as: Suffix; neuropathy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-pathy = disease or disorder.
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Medical Word Parts

-penia

Suffix meaning deficiency or low amount

A medical suffix that means deficiency or low amount. Example: leukopenia means low white blood cells.

Also known as: Suffix; leukopenia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-penia = deficiency or low amount.
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Medical Word Parts

-pexy

Suffix meaning surgical fixation

A medical suffix that means surgical fixation. Example: nephropexy means kidney fixation.

Also known as: Suffix; nephropexy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-pexy = surgical fixation.
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Medical Word Parts

-phagia

Suffix meaning eating or swallowing

A medical suffix that means eating or swallowing. Example: dysphagia means difficulty swallowing.

Also known as: Suffix; dysphagia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-phagia = eating or swallowing.
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Medical Word Parts

-phasia

Suffix meaning speech

A medical suffix that means speech. Example: aphasia means loss of speech ability.

Also known as: Suffix; aphasia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-phasia = speech.
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Medical Word Parts

-plasia

Suffix meaning formation or growth

A medical suffix that means formation or growth. Example: hyperplasia means excessive growth.

Also known as: Suffix; hyperplasia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-plasia = formation or growth.
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Medical Word Parts

-plasty

Suffix meaning surgical repair

A medical suffix that means surgical repair. Example: angioplasty means vessel repair.

Also known as: Suffix; angioplasty

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-plasty = surgical repair.
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Medical Word Parts

-plegia

Suffix meaning paralysis

A medical suffix that means paralysis. Example: hemiplegia means paralysis on one side.

Also known as: Suffix; hemiplegia

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-plegia = paralysis.
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Medical Word Parts

-pnea

Suffix meaning breathing

A medical suffix that means breathing. Example: apnea means absence of breathing.

Also known as: Suffix; apnea

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-pnea = breathing.
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Medical Word Parts

-ptosis

Suffix meaning drooping

A medical suffix that means drooping. Example: blepharoptosis means drooping eyelid.

Also known as: Suffix; blepharoptosis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-ptosis = drooping.
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Medical Word Parts

-rrhage

Suffix meaning bursting flow

A medical suffix that means bursting flow. Example: hemorrhage means bursting flow of blood.

Also known as: Suffix; hemorrhage

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-rrhage = bursting flow.
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Medical Word Parts

-rrhea

Suffix meaning flow or discharge

A medical suffix that means flow or discharge. Example: diarrhea means abnormal flow.

Also known as: Suffix; diarrhea

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-rrhea = flow or discharge.
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Medical Word Parts

-sclerosis

Suffix meaning hardening

A medical suffix that means hardening. Example: arteriosclerosis means hardening of arteries.

Also known as: Suffix; arteriosclerosis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-sclerosis = hardening.
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Medical Word Parts

-scopy

Suffix meaning visual examination

A medical suffix that means visual examination. Example: endoscopy means visual exam inside body.

Also known as: Suffix; endoscopy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-scopy = visual examination.
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Medical Word Parts

-spasm

Suffix meaning involuntary contraction

A medical suffix that means involuntary contraction. Example: bronchospasm means airway muscle contraction.

Also known as: Suffix; bronchospasm

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-spasm = involuntary contraction.
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Medical Word Parts

-stasis

Suffix meaning stopping or controlling

A medical suffix that means stopping or controlling. Example: hemostasis means stopping bleeding.

Also known as: Suffix; hemostasis

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-stasis = stopping or controlling.
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Medical Word Parts

-trophy

Suffix meaning growth or nourishment

A medical suffix that means growth or nourishment. Example: atrophy means lack of growth or wasting.

Also known as: Suffix; atrophy

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-trophy = growth or nourishment.
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Medical Word Parts

-uria

Suffix meaning urine condition

A medical suffix that means urine condition. Example: polyuria means excessive urination.

Also known as: Suffix; polyuria

Clinical note: This suffix often identifies a condition, procedure, process, or test.

-uria = urine condition.
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Medical Word Parts

a- / an-

Prefix meaning without or absence

A medical prefix that means without or absence. Example: apnea means absence of breathing.

Also known as: Prefix; apnea

Clinical note: This word part helps learners decode terms before memorizing full definitions.

a- / an- = without or absence.
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Lab Values

A1C

Average blood sugar marker

A blood test reflecting average glucose over about three months.

Also known as: Hemoglobin A1C

Clinical note: Used in diabetes screening and monitoring.

A1C = longer-term glucose clue.
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Medical Word Parts

ab-

Prefix meaning away from

A medical prefix that means away from. Example: abduction means movement away from midline.

Also known as: Prefix; abduction

Clinical note: This word part helps learners decode terms before memorizing full definitions.

ab- = away from.
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Anatomy

Abdomen

Belly area

The body region between the chest and pelvis.

Also known as: Abdominal Area

Clinical note: Contains digestive, urinary, vascular, and reproductive structures.

Abdomen = abdominal cavity.
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Assessment

Abdominal pain

Pain in belly area

Pain located in the abdomen.

Also known as: Belly Pain

Clinical note: Assess location, onset, severity, associated symptoms, and red flags.

Abdominal pain needs location.
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Anatomy

Abduction

Movement away from midline

Movement of a body part away from the center line of the body.

Also known as: Abduct

Clinical note: Raising the arm to the side is abduction.

Abduction takes away.
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ABG

ABG

Arterial blood gas

A blood test that measures pH, oxygen, carbon dioxide, and bicarbonate.

Also known as: Arterial Blood Gas

Clinical note: Used to evaluate oxygenation, ventilation, and acid-base balance.

ABG = arterial blood gas.
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Assessment

Abrasion

Scrape

A superficial injury where the top layer of skin is rubbed away.

Also known as: Scrape

Clinical note: Monitor for bleeding, pain, contamination, and infection signs.

Abrasion = scraped skin.
Assessment

Abscess

Pocket of pus

A localized collection of pus caused by infection.

Also known as: Pus Pocket

Clinical note: May be painful, red, swollen, warm, and may require drainage.

Abscess = enclosed infection.
Pharmacology

ACE inhibitor

Blood pressure medication class

A medication class that affects the renin-angiotensin system to lower blood pressure.

Also known as: Lisinopril Class

Clinical note: Can affect potassium and kidney-related labs depending patient context.

ACE inhibitor lowers pressure pathway.
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Pharmacology

Acetaminophen

Pain/fever medication

A medication commonly used for pain and fever reduction.

Also known as: Tylenol

Clinical note: Dose limits and liver considerations are important.

Acetaminophen = pain/fever.
ABG

Acidosis

Too much acid

A condition where blood is more acidic than normal.

Also known as: Acidotic

Clinical note: Usually reflected by a low pH on ABG interpretation.

Acidosis = low pH.
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Medical Word Parts

ad-

Prefix meaning toward

A medical prefix that means toward. Example: adduction means movement toward midline.

Also known as: Prefix; adduction

Clinical note: This word part helps learners decode terms before memorizing full definitions.

ad- = toward.
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Anatomy

Adduction

Movement toward midline

Movement of a body part toward the center line of the body.

Also known as: Adduct

Clinical note: Bringing the arm back to the side is adduction.

Adduction adds toward body.
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Medical Word Parts

aden

Root meaning gland

A medical root word that means gland. Example: adenopathy means gland disease.

Also known as: Root word; adenopathy

Clinical note: Root words carry the main meaning of many medical terms.

aden = gland.
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Assessment

Afebrile

No fever

Having a normal body temperature without fever.

Also known as: Without Fever

Clinical note: Often documented during assessment.

A- means without; febrile means fever.
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Lab Values

Albumin

Blood protein

A protein made by the liver that helps maintain oncotic pressure and transport substances.

Also known as: Serum Albumin

Clinical note: Low albumin can relate to nutrition, liver, kidney, or fluid issues.

Albumin holds fluid in vessels.
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Lab Values

Alkaline phosphatase

Liver/bone enzyme

An enzyme associated with bile ducts, liver, and bone.

Also known as: ALP

Clinical note: Interpreted with liver panel and clinical context.

ALP = liver/bone clue.
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ABG

Alkalosis

Too much base

A condition where blood is more alkaline than normal.

Also known as: Alkalotic

Clinical note: Usually reflected by a high pH on ABG interpretation.

Alkalosis = high pH.
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Lab Values

ALT

Liver enzyme

A liver enzyme that may rise with liver injury.

Also known as: Alanine Aminotransferase

Clinical note: Often interpreted with AST and other liver tests.

ALT = liver enzyme.
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Anatomy

Alveoli

Air sacs

Tiny air sacs in the lungs where oxygen and carbon dioxide exchange occurs.

Also known as: Lung Air Sacs

Clinical note: Central to gas exchange and respiratory function.

Alveoli exchange gas.
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Assessment

Ambulation

Walking

The act of walking or moving from place to place.

Also known as: Ambulate

Clinical note: Assessment includes gait, balance, assistive devices, and fall risk.

Ambulation = walking.
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Lab Values

Amylase

Digestive enzyme lab

An enzyme lab often associated with pancreas and salivary glands.

Also known as: Pancreatic Enzyme

Clinical note: Interpreted with lipase and symptoms.

Amylase digests starch.
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Pharmacology

Analgesic

Pain medication

A medication used to relieve pain.

Also known as: Pain Reliever

Clinical note: Different classes have different risks and monitoring needs.

-algia = pain; analgesic relieves pain.
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Conditions

Anemia

Low red blood cells or hemoglobin

A condition where blood has reduced oxygen-carrying ability.

Also known as: Low Hgb; Low Hemoglobin

Clinical note: May cause fatigue, pallor, weakness, shortness of breath, or dizziness.

-emia = blood condition.
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Medical Equipment

Anesthesia machine

Anesthesia delivery system

Machine used to deliver anesthetic gases and support ventilation during procedures.

Also known as: Anesthesia Workstation

Clinical note: Requires trained clinical use and equipment checks.

Anesthesia machine supports surgery.
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Conditions

Aneurysm

Bulging blood vessel

A weakened area of a blood vessel wall that bulges outward.

Also known as: Vessel Bulge

Clinical note: Risk depends on size, location, and rupture potential.

Aneurysm = vessel balloon.
Medical Word Parts

angi / vas

Root meaning vessel

A medical root word that means vessel. Example: angioplasty means vessel repair.

Also known as: Root word; angioplasty

Clinical note: Root words carry the main meaning of many medical terms.

angi / vas = vessel.
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Conditions

Angina

Chest pain from reduced blood flow

Chest discomfort usually related to reduced oxygen supply to heart muscle.

Also known as: Chest Pain

Clinical note: Needs careful assessment because symptoms can overlap with heart attack.

Angina = cardiac chest discomfort.
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Procedures

Angioplasty

Vessel repair/opening

A procedure used to widen or open a narrowed blood vessel.

Also known as: Vessel Procedure

Clinical note: Often discussed in cardiac or vascular care.

Angio = vessel; plasty = repair.
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Anatomy

Anterior

Toward the front

A directional term meaning toward the front of the body.

Also known as: Ventral

Clinical note: Used to describe location in anatomy and assessment.

Anterior = front.
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Medical Word Parts

anti-

Prefix meaning against

A medical prefix that means against. Example: antibiotic means against bacteria.

Also known as: Prefix; antibiotic

Clinical note: This word part helps learners decode terms before memorizing full definitions.

anti- = against.
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Pharmacology

Antibiotic

Medication against bacteria

A medication used to treat bacterial infections.

Also known as: Antibacterial

Clinical note: Not used for viral infections unless bacterial concern exists.

Anti- = against.
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Pharmacology

Anticoagulant

Blood thinner

A medication that reduces blood clotting tendency.

Also known as: Blood Thinner

Clinical note: Requires attention to bleeding risk and labs depending medication.

Anticoagulant = against clotting.
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Pharmacology

Antipyretic

Fever reducer

A medication used to lower fever.

Also known as: Fever Reducer

Clinical note: Common example includes acetaminophen.

Pyretic = fever.
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Anatomy

Aorta

Main artery

The largest artery carrying blood away from the heart to the body.

Also known as: Large Artery

Clinical note: Major vessel leaving the left ventricle.

Aorta = main outgoing artery.
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Respiratory

Apnea

No breathing

Temporary absence of breathing.

Also known as: Stopped Breathing

Clinical note: A critical finding if prolonged or associated with distress.

A- means without; -pnea means breathing.
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Procedures

Appendectomy

Appendix removal

Surgical removal of the appendix.

Also known as: Appendix Surgery

Clinical note: -ectomy means surgical removal.

Appendectomy = appendix removed.
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Conditions

Appendicitis

Inflammation of the appendix

A medical term meaning inflammation of the appendix.

Also known as: appendic + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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EKG

Arrhythmia

Abnormal heart rhythm

A rhythm that is irregular, too fast, too slow, or otherwise abnormal.

Also known as: Dysrhythmia

Clinical note: Detected through pulse assessment, monitoring, or EKG.

A-rhythm = abnormal rhythm.
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Medical Word Parts

arteri

Root meaning artery

A medical root word that means artery. Example: arteriosclerosis means artery hardening.

Also known as: Root word; arteriosclerosis

Clinical note: Root words carry the main meaning of many medical terms.

arteri = artery.
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Anatomy

Artery

Blood vessel away from heart

A vessel that carries blood away from the heart.

Also known as: Arterial Vessel

Clinical note: Usually carries oxygenated blood except pulmonary arteries.

Arteries go away.
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Medical Word Parts

arthr

Root meaning joint

A medical root word that means joint. Example: arthritis means joint inflammation.

Also known as: Root word; arthritis

Clinical note: Root words carry the main meaning of many medical terms.

arthr = joint.
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Conditions

Arthritis

Inflammation of the joint

A medical term meaning inflammation of the joint.

Also known as: arthr + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Arthroscopy

Visual examination of the joint

A procedure using a scope to visually examine the joint.

Also known as: joint scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Lab Values

AST

Liver/muscle enzyme

An enzyme found in liver, heart, muscle, and other tissues.

Also known as: Aspartate Aminotransferase

Clinical note: Often interpreted with ALT and clinical context.

AST = enzyme clue.
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Conditions

Asthma

Reversible airway narrowing

A respiratory condition involving airway inflammation and bronchospasm.

Also known as: Reactive Airway Disease

Clinical note: May cause wheezing, cough, chest tightness, and shortness of breath.

Asthma = airway narrowing.
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EKG

Asystole

No electrical activity

A flatline rhythm with no effective cardiac electrical activity.

Also known as: Flatline

Clinical note: A life-threatening rhythm requiring emergency response.

Asystole = no systole.
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Conditions

Atelectasis

Collapsed air sacs

Partial or complete collapse of alveoli in the lung.

Also known as: Collapsed Lung Area

Clinical note: May occur after surgery or with shallow breathing.

Atelectasis = alveoli not open.
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EKG

Atrial fibrillation

Irregular atrial rhythm

A common arrhythmia with irregular electrical activity in the atria.

Also known as: AFib

Clinical note: Often produces an irregularly irregular pulse.

AFib = irregular atrial rhythm.
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Anatomy

Atrium

Upper heart chamber

One of the upper chambers of the heart that receives blood.

Also known as: Atria

Clinical note: Right and left atria receive blood returning to the heart.

Atrium receives.
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Medical Word Parts

auto-

Prefix meaning self

A medical prefix that means self. Example: autoimmune means immune response against self.

Also known as: Prefix; autoimmune

Clinical note: This word part helps learners decode terms before memorizing full definitions.

auto- = self.
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Medical Equipment

Autoclave

Sterilizer

Device that uses steam under pressure to sterilize instruments.

Also known as: Steam Sterilizer

Clinical note: Used in sterile processing and clinical settings.

Autoclave sterilizes.
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Conditions

Bacteremia

Bacteria in blood

Presence of bacteria in the bloodstream.

Also known as: Bloodstream Bacteria

Clinical note: Can become serious and may progress to sepsis.

-emia = blood condition.
Pharmacology

Beta blocker

Heart rate/blood pressure medication

A medication class that blocks beta receptors and can lower heart rate and blood pressure.

Also known as: Metoprolol Class

Clinical note: Assessment of pulse and blood pressure may be important before administration.

Beta blockers block stimulation.
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Medical Word Parts

bi-

Prefix meaning two

A medical prefix that means two. Example: bilateral means both sides.

Also known as: Prefix; bilateral

Clinical note: This word part helps learners decode terms before memorizing full definitions.

bi- = two.
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Abbreviations

BID

Twice daily

Medication or care frequency meaning two times per day.

Also known as: bis in die

Clinical note: Important abbreviation to verify according to policy.

BID = two times daily.
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Lab Values

Bilirubin

Bile pigment

A substance produced from breakdown of red blood cells.

Also known as: Bili

Clinical note: High levels can contribute to jaundice.

Bilirubin = yellow pigment.
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Procedures

Biopsy

Tissue sample

Removal of a small tissue sample for examination.

Also known as: Tissue Sampling

Clinical note: Used to help diagnose disease processes.

Biopsy = tissue test.
Lab Values

BNP

Heart strain marker

A blood marker associated with ventricular stretch and heart failure evaluation.

Also known as: Brain Natriuretic Peptide

Clinical note: Used with symptoms, exam, and other tests.

BNP = heart stretch clue.
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Abbreviations

BP

Blood pressure

A vital sign measuring force of blood against artery walls.

Also known as: Blood Pressure

Clinical note: Usually written as systolic over diastolic.

BP = blood pressure.
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Medical Word Parts

brady-

Prefix meaning slow

A medical prefix that means slow. Example: bradycardia means slow heart rate.

Also known as: Prefix; bradycardia

Clinical note: This word part helps learners decode terms before memorizing full definitions.

brady- = slow.
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Respiratory

Bradypnea

Slow breathing

A respiratory rate slower than expected.

Also known as: Slow Respirations

Clinical note: May be concerning with sedation or respiratory depression.

Brady- means slow; -pnea means breathing.
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Anatomy

Brainstem

Basic life function center

Part of the brain connecting to the spinal cord and helping regulate vital functions.

Also known as: Stem of Brain

Clinical note: Important for breathing, heart rate, and alertness.

Brainstem = survival functions.
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Anatomy

Bronchi

Large airways

Major air passages branching from the trachea into the lungs.

Also known as: Bronchial Tubes

Clinical note: Conduct air into the lungs.

Bronchi branch.
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Conditions

Bronchitis

Inflammation of bronchi

Inflammation of the large airways in the lungs.

Also known as: Airway Inflammation

Clinical note: Can cause cough, mucus, wheezing, and chest discomfort.

-itis = inflammation.
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Pharmacology

Bronchodilator

Airway-opening medication

A medication that relaxes airway muscles to improve airflow.

Also known as: Inhaler; Albuterol

Clinical note: Used in bronchospasm conditions such as asthma or COPD.

Broncho = airway; dilator = opens.
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Procedures

Bronchoscopy

Visual examination of the bronchi/airways

A procedure using a scope to visually examine the bronchi/airways.

Also known as: bronchi/airways scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Lab Values

BUN

Blood urea nitrogen

A blood test that helps evaluate kidney function and hydration status.

Also known as: Blood Urea Nitrogen

Clinical note: Often interpreted with creatinine and GFR.

BUN = kidney waste clue.
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Abbreviations

C/O

Complains of

Abbreviation used to document what a patient reports.

Also known as: Complaint Of

Clinical note: Use objective charting and patient quotes when appropriate.

C/O = complains of.
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Lab Values

Calcium

Electrolyte/mineral

A mineral important for bones, muscles, nerves, and clotting.

Also known as: Ca

Clinical note: Abnormal calcium can affect muscles and rhythm.

Calcium = bones and contraction.
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Anatomy

Capillary

Tiny exchange vessel

A tiny blood vessel where exchange occurs between blood and tissue.

Also known as: Microvessel

Clinical note: Important for oxygen, nutrient, and waste exchange.

Capillaries exchange.
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Assessment

Capillary refill

Perfusion check

Time it takes for color to return after pressure is applied to skin or nail bed.

Also known as: Cap Refill

Clinical note: One clue for peripheral circulation.

Cap refill = circulation clue.
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Medical Word Parts

cardi / cardio

Root meaning heart

A medical root word that means heart. Example: cardiology means study of the heart.

Also known as: Root word; cardiology

Clinical note: Root words carry the main meaning of many medical terms.

cardi / cardio = heart.
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Conditions

Carditis

Inflammation of the heart

A medical term meaning inflammation of the heart.

Also known as: card + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Conditions

Cellulitis

Skin infection

Infection of the skin and soft tissue.

Also known as: Skin Infection

Clinical note: Often appears red, warm, swollen, and painful.

Cellulitis = skin infection.
Anatomy

Cerebellum

Coordination brain area

Brain region involved in balance and coordination.

Also known as: Little Brain

Clinical note: Important for smooth movement.

Cerebellum coordinates.
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Anatomy

Cerebrum

Largest brain region

The largest part of the brain involved in higher thinking, movement, and sensation.

Also known as: Brain

Clinical note: Includes right and left hemispheres.

Cerebrum = main thinking brain.
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Assessment

Chest pain

Pain or discomfort in chest

A symptom that can have cardiac, respiratory, GI, muscle, anxiety, or other causes.

Also known as: Chest Discomfort

Clinical note: Needs careful assessment because some causes are life-threatening.

Chest pain = priority symptom.
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Lab Values

Chloride

Electrolyte

An electrolyte involved in fluid and acid-base balance.

Also known as: Cl

Clinical note: Often interpreted with sodium and bicarbonate.

Chloride balances charge.
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Medical Word Parts

chole

Root meaning bile or gallbladder

A medical root word that means bile or gallbladder. Example: cholecystectomy means gallbladder removal.

Also known as: Root word; cholecystectomy

Clinical note: Root words carry the main meaning of many medical terms.

chole = bile or gallbladder.
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Procedures

Cholecystectomy

Gallbladder removal

Surgical removal of the gallbladder.

Also known as: Gallbladder Surgery

Clinical note: Common procedure for certain gallbladder conditions.

-ectomy = removal.
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Medical Word Parts

circum-

Prefix meaning around

A medical prefix that means around. Example: circumoral means around the mouth.

Also known as: Prefix; circumoral

Clinical note: This word part helps learners decode terms before memorizing full definitions.

circum- = around.
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Assessment

Clubbing

Nail shape change

Bulbous enlargement of fingertips or nail angle changes sometimes linked with chronic hypoxia.

Also known as: Nail Clubbing

Clinical note: Can be a respiratory or cardiovascular clue.

Clubbing = chronic oxygen clue.
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Medical Word Parts

col / colon

Root meaning colon

A medical root word that means colon. Example: colostomy means opening into colon.

Also known as: Root word; colostomy

Clinical note: Root words carry the main meaning of many medical terms.

col / colon = colon.
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Procedures

Colectomy

Surgical removal of the colon

A surgical procedure involving removal of the colon.

Also known as: colon removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Procedures

Colonoscopy

Visual exam of colon

A procedure using a scope to examine the colon.

Also known as: Colon Scope

Clinical note: Used for screening, diagnosis, or evaluation.

Colono + scopy = colon visual exam.
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ABG

Compensation

Body balancing response

A physiologic response where the respiratory or metabolic system tries to correct an acid-base imbalance.

Also known as: ABG Compensation

Clinical note: ABG questions may ask whether the body is compensating.

Compensation = correction attempt.
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Medical Word Parts

contra-

Prefix meaning against or opposite

A medical prefix that means against or opposite. Example: contraindication means reason not to use.

Also known as: Prefix; contraindication

Clinical note: This word part helps learners decode terms before memorizing full definitions.

contra- = against or opposite.
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Conditions

COPD

Chronic obstructive pulmonary disease

A chronic lung disease involving airflow limitation.

Also known as: Chronic Lung Disease

Clinical note: May involve emphysema, chronic bronchitis, oxygen needs, and exacerbations.

COPD = chronic obstructed airflow.
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Respiratory

Cough

Forceful air expulsion

A protective reflex that clears the airway of irritants, secretions, or foreign material.

Also known as: Coughing

Clinical note: Assess duration, sputum, blood, fever, and respiratory distress.

Cough protects airway.
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Respiratory

Crackles

Popping lung sounds

Short, popping breath sounds that may be associated with fluid or alveolar opening.

Also known as: Rales

Clinical note: Need clinical context such as fluid overload or pneumonia.

Crackles sound like popping.
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Medical Equipment

Crash cart

Emergency supply cart

A cart stocked with emergency equipment and medications.

Also known as: Code Cart

Clinical note: Used during emergencies according to facility protocols.

Crash cart = emergency cart.
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Lab Values

Creatinine

Kidney function marker

A waste product measured in blood to help evaluate kidney function.

Also known as: Cr

Clinical note: Often interpreted with BUN and GFR.

Creatinine rises when filtering worsens.
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Conditions

CVA

Stroke

A brain injury caused by interrupted blood flow or bleeding in the brain.

Also known as: Cerebrovascular Accident; Stroke

Clinical note: May cause facial droop, weakness, speech changes, or confusion.

CVA = stroke.
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Assessment

Cyanosis

Bluish discoloration

Blue or bluish color of skin or mucous membranes often linked with low oxygenation.

Also known as: Blue Skin

Clinical note: A concerning assessment finding, especially with distress.

Cyan = blue.
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Medical Word Parts

cyst

Root meaning bladder

A medical root word that means bladder. Example: cystitis means bladder inflammation.

Also known as: Root word; cystitis

Clinical note: Root words carry the main meaning of many medical terms.

cyst = bladder.
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Conditions

Cystitis

Inflammation of the bladder

A medical term meaning inflammation of the bladder.

Also known as: cyst + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Cystoscopy

Visual examination of the bladder

A procedure using a scope to visually examine the bladder.

Also known as: bladder scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Medical Word Parts

cyt

Root meaning cell

A medical root word that means cell. Example: cytology means study of cells.

Also known as: Root word; cytology

Clinical note: Root words carry the main meaning of many medical terms.

cyt = cell.
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Medical Word Parts

de-

Prefix meaning down or away

A medical prefix that means down or away. Example: dehydration means loss of water.

Also known as: Prefix; dehydration

Clinical note: This word part helps learners decode terms before memorizing full definitions.

de- = down or away.
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Medical Equipment

Defibrillator

Shock device

Device used to deliver electrical therapy for certain life-threatening rhythms.

Also known as: Code Cart Device

Clinical note: Used in emergencies according to protocols.

Defib delivers shock.
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Conditions

Dehydration

Fluid deficit

A condition where the body does not have enough fluid.

Also known as: Volume Depletion

Clinical note: May affect blood pressure, heart rate, urine output, and labs.

Dehydration = low fluid.
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Medical Word Parts

derm / dermat

Root meaning skin

A medical root word that means skin. Example: dermatitis means skin inflammation.

Also known as: Root word; dermatitis

Clinical note: Root words carry the main meaning of many medical terms.

derm / dermat = skin.
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Conditions

Dermatitis

Inflammation of the skin

A medical term meaning inflammation of the skin.

Also known as: dermat + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Medical Word Parts

dia-

Prefix meaning through or across

A medical prefix that means through or across. Example: diarrhea means flow through.

Also known as: Prefix; diarrhea

Clinical note: This word part helps learners decode terms before memorizing full definitions.

dia- = through or across.
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Procedures

Dialysis

Blood filtering therapy

Treatment that removes waste and fluid when kidneys cannot do so adequately.

Also known as: Hemodialysis

Clinical note: Related to kidney failure and renal replacement therapy.

Dialysis filters blood.
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Assessment

Diaphoresis

Sweating

Excessive sweating noted during assessment.

Also known as: Sweaty; Clammy

Clinical note: Can occur with pain, fever, shock, hypoglycemia, or cardiac symptoms.

Diaphoresis = sweating.
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Anatomy

Diaphragm

Main breathing muscle

A dome-shaped muscle that helps drive breathing.

Also known as: Breathing Muscle

Clinical note: Contracts during inhalation.

Diaphragm drives breathing.
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Conditions

Diarrhea

Frequent loose stools

Loose or watery stool occurring more often than normal.

Also known as: Loose Stool

Clinical note: Can contribute to dehydration and electrolyte imbalance.

-rrhea = flow/discharge.
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Anatomy

Distal

Farther from attachment

Farther from the point where a limb or structure attaches to the body.

Also known as: Far from Origin

Clinical note: Often used for arms and legs.

Distal = distant.
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Pharmacology

Diuretic

Water pill

A medication that increases urine output.

Also known as: Water Pill

Clinical note: Can affect electrolytes and fluid balance.

Diuretic = drives urine.
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Assessment

Dizziness

Feeling lightheaded or unsteady

A symptom that may involve balance, circulation, neurologic, medication, or inner ear causes.

Also known as: Lightheaded

Clinical note: Assess onset, triggers, vitals, neuro status, and fall risk.

Dizziness = safety clue.
Medical Word Parts

dys-

Prefix meaning bad, difficult, or abnormal

A medical prefix that means bad, difficult, or abnormal. Example: dyspnea means difficult breathing.

Also known as: Prefix; dyspnea

Clinical note: This word part helps learners decode terms before memorizing full definitions.

dys- = bad, difficult, or abnormal.
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Respiratory

Dyspnea

Difficulty breathing

Subjective feeling of shortness of breath or difficult breathing.

Also known as: Shortness of Breath

Clinical note: Requires respiratory assessment and context.

Dys- = difficult; -pnea = breathing.
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Medical Word Parts

ec- / ecto-

Prefix meaning outside

A medical prefix that means outside. Example: ectopic means out of place.

Also known as: Prefix; ectopic

Clinical note: This word part helps learners decode terms before memorizing full definitions.

ec- / ecto- = outside.
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Medical Equipment

ECG monitor

Heart rhythm monitor

A monitoring device that displays cardiac electrical activity.

Also known as: EKG Monitor

Clinical note: Used for rhythm monitoring and clinical assessment.

ECG monitor shows rhythm.
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Conditions

Edema

Swelling

Fluid accumulation in tissues.

Also known as: Swelling

Clinical note: Can be localized or generalized and may be pitting or non-pitting.

Edema = fluid swelling.
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Medical Word Parts

en-

Prefix meaning in or within

A medical prefix that means in or within. Example: encephalitis means inflammation within brain tissue context.

Also known as: Prefix; encephalitis

Clinical note: This word part helps learners decode terms before memorizing full definitions.

en- = in or within.
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Medical Word Parts

encephal

Root meaning brain

A medical root word that means brain. Example: encephalitis means brain inflammation.

Also known as: Root word; encephalitis

Clinical note: Root words carry the main meaning of many medical terms.

encephal = brain.
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Conditions

Encephalitis

Inflammation of the brain

A medical term meaning inflammation of the brain.

Also known as: encephal + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Medical Word Parts

endo-

Prefix meaning inside or within

A medical prefix that means inside or within. Example: endoscopy means visual exam inside body.

Also known as: Prefix; endoscopy

Clinical note: This word part helps learners decode terms before memorizing full definitions.

endo- = inside or within.
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Procedures

Endoscopy

Visual exam inside body

A procedure using a scope to look inside the body.

Also known as: Scope Procedure

Clinical note: Examples include upper endoscopy and colonoscopy.

Endo = inside; scopy = visual exam.
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Medical Word Parts

enter

Root meaning intestine

A medical root word that means intestine. Example: enteritis means intestinal inflammation.

Also known as: Root word; enteritis

Clinical note: Root words carry the main meaning of many medical terms.

enter = intestine.
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Medical Equipment

Enteral feeding pump

Tube feeding pump

Device used to deliver nutrition through a feeding tube.

Also known as: Feeding Pump

Clinical note: Used when patients receive nutrition through enteral access.

Enteral pump feeds gut.
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Conditions

Enteritis

Inflammation of the intestine

A medical term meaning inflammation of the intestine.

Also known as: enter + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Medical Word Parts

epi-

Prefix meaning upon or above

A medical prefix that means upon or above. Example: epidermis means outer layer of skin.

Also known as: Prefix; epidermis

Clinical note: This word part helps learners decode terms before memorizing full definitions.

epi- = upon or above.
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Assessment

Erythema

Redness

Redness of skin or mucous membranes.

Also known as: Skin Redness

Clinical note: Can be associated with inflammation, infection, irritation, or pressure.

Erythr/o = red.
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Medical Word Parts

erythr

Root meaning red

A medical root word that means red. Example: erythrocyte means red blood cell.

Also known as: Root word; erythrocyte

Clinical note: Root words carry the main meaning of many medical terms.

erythr = red.
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Medical Equipment

ESU

Electrosurgical unit

Device that uses electrical energy for cutting or coagulating tissue during surgery.

Also known as: Bovie

Clinical note: Important for OR safety and grounding/return electrode concepts.

ESU = surgical electricity.
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Medical Word Parts

eu-

Prefix meaning normal or good

A medical prefix that means normal or good. Example: eupnea means normal breathing.

Also known as: Prefix; eupnea

Clinical note: This word part helps learners decode terms before memorizing full definitions.

eu- = normal or good.
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Respiratory

Eupnea

Normal breathing

Normal, unlabored breathing.

Also known as: Normal Respirations

Clinical note: Contrasts with dyspnea, apnea, tachypnea, and bradypnea.

Eu- = normal/good; -pnea = breathing.
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Medical Word Parts

extra-

Prefix meaning outside

A medical prefix that means outside. Example: extracellular means outside the cell.

Also known as: Prefix; extracellular

Clinical note: This word part helps learners decode terms before memorizing full definitions.

extra- = outside.
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Assessment

Fatigue

Extreme tiredness

A subjective feeling of tiredness or lack of energy.

Also known as: Tiredness

Clinical note: Can be caused by anemia, infection, sleep issues, medications, chronic illness, and more.

Fatigue = low energy.
Anatomy

Femur

Thigh bone

The long bone of the upper leg.

Also known as: Thigh Bone

Clinical note: The femur is the longest bone in the body.

Femur = thigh.
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Vital Signs

Fever

Elevated body temperature

A higher-than-normal temperature, often associated with infection or inflammation.

Also known as: Febrile

Clinical note: Assess symptoms, trend, and patient risk.

Fever = elevated temp.
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Anatomy

Fibula

Smaller lower leg bone

The smaller bone on the lateral side of the lower leg.

Also known as: Lower Leg Bone

Clinical note: Helps stabilize ankle and lower leg.

Fibula is fine/smaller.
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Conditions

Fluid overload

Too much fluid

Excess fluid in the body or circulation.

Also known as: Volume Overload

Clinical note: May cause edema, crackles, weight gain, or shortness of breath.

Fluid overload = excess volume.
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Assessment

Gait

Walking pattern

The way a person walks.

Also known as: Walk Pattern

Clinical note: Assessed for balance, strength, coordination, and fall risk.

Gait = walking style.
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Medical Word Parts

gastr

Root meaning stomach

A medical root word that means stomach. Example: gastritis means stomach inflammation.

Also known as: Root word; gastritis

Clinical note: Root words carry the main meaning of many medical terms.

gastr = stomach.
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Procedures

Gastrectomy

Surgical removal of the stomach

A surgical procedure involving removal of the stomach.

Also known as: stomach removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Conditions

Gastritis

Inflammation of the stomach

A medical term meaning inflammation of the stomach.

Also known as: gastr + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Gastroscopy

Visual examination of the stomach

A procedure using a scope to visually examine the stomach.

Also known as: stomach scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Lab Values

GFR

Glomerular filtration rate

An estimate of how well the kidneys are filtering blood.

Also known as: Kidney Filtration

Clinical note: Used to stage kidney function.

GFR = kidney filtering estimate.
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Conditions

Gingivitis

Inflammation of the gums

A medical term meaning inflammation of the gums.

Also known as: gingiv + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Anatomy

Glomerulus

Kidney filter network

A capillary network in the nephron that filters blood.

Also known as: Kidney Filter Ball

Clinical note: The first major filtering structure in the nephron.

Glomerulus filters.
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Medical Word Parts

gloss

Root meaning tongue

A medical root word that means tongue. Example: glossitis means tongue inflammation.

Also known as: Root word; glossitis

Clinical note: Root words carry the main meaning of many medical terms.

gloss = tongue.
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Lab Values

Glucose

Blood sugar

A sugar used by the body for energy.

Also known as: Blood Sugar

Clinical note: High or low glucose can affect mental status and safety.

Glucose = sugar fuel.
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Medical Word Parts

glyc

Root meaning sugar

A medical root word that means sugar. Example: hypoglycemia means low blood sugar.

Also known as: Root word; hypoglycemia

Clinical note: Root words carry the main meaning of many medical terms.

glyc = sugar.
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Assessment

Guarding

Protective body tension

Tensing or protecting an area due to pain or irritation.

Also known as: Abdominal Guarding

Clinical note: Can be an important pain or abdominal assessment clue.

Guarding protects pain area.
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ABG

HCO3

Bicarbonate

The metabolic component used in basic ABG interpretation.

Also known as: Bicarb; Bicarbonate

Clinical note: Low HCO3 points toward metabolic acidosis; high HCO3 points toward metabolic alkalosis.

HCO3 is metabolic.
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Conditions

Heart failure

Poor heart pumping/filling

A condition where the heart cannot meet the body's needs effectively.

Also known as: HF; CHF

Clinical note: Can cause edema, shortness of breath, fatigue, and fluid issues.

Heart failure = pump/fill problem.
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Medical Word Parts

hem / hemat

Root meaning blood

A medical root word that means blood. Example: hematology means study of blood.

Also known as: Root word; hematology

Clinical note: Root words carry the main meaning of many medical terms.

hem / hemat = blood.
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Lab Values

Hematocrit

Percent of blood made of RBCs

The proportion of blood volume occupied by red blood cells.

Also known as: Hct

Clinical note: Often interpreted with hemoglobin.

Hematocrit = packed RBC percentage.
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Medical Word Parts

hemi-

Prefix meaning half

A medical prefix that means half. Example: hemiplegia means paralysis of one side.

Also known as: Prefix; hemiplegia

Clinical note: This word part helps learners decode terms before memorizing full definitions.

hemi- = half.
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Lab Values

Hemoglobin

Oxygen-carrying protein

A protein in red blood cells that carries oxygen.

Also known as: Hgb

Clinical note: Low hemoglobin can indicate anemia or blood loss.

Hgb carries oxygen.
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Medical Word Parts

hepat

Root meaning liver

A medical root word that means liver. Example: hepatitis means liver inflammation.

Also known as: Root word; hepatitis

Clinical note: Root words carry the main meaning of many medical terms.

hepat = liver.
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Conditions

Hepatitis

Inflammation of the liver

A medical term meaning inflammation of the liver.

Also known as: hepat + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Anatomy

Humerus

Upper arm bone

The long bone of the upper arm.

Also known as: Upper Arm Bone

Clinical note: Connects shoulder to elbow.

Humerus = upper arm.
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Medical Word Parts

hyper-

Prefix meaning high or above normal

A medical prefix that means high or above normal. Example: hypertension means high blood pressure.

Also known as: Prefix; hypertension

Clinical note: This word part helps learners decode terms before memorizing full definitions.

hyper- = high or above normal.
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Conditions

Hyperglycemia

High blood sugar

Blood glucose higher than normal.

Also known as: High Glucose

Clinical note: May occur with diabetes, stress, steroids, or other causes.

Hyper- = high; glyc = sugar.
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Conditions

Hyperkalemia

High potassium

Potassium level higher than normal.

Also known as: High K

Clinical note: Can be dangerous because potassium affects cardiac rhythm.

Hyper- = high; kal = potassium.
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Conditions

Hypernatremia

High sodium

Sodium level higher than normal.

Also known as: High Na

Clinical note: Often related to water balance and dehydration states.

Hyper- = high; natr = sodium.
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Medical Word Parts

hypo-

Prefix meaning low or below normal

A medical prefix that means low or below normal. Example: hypoglycemia means low blood sugar.

Also known as: Prefix; hypoglycemia

Clinical note: This word part helps learners decode terms before memorizing full definitions.

hypo- = low or below normal.
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Conditions

Hypoglycemia

Low blood sugar

Blood glucose lower than normal.

Also known as: Low Glucose

Clinical note: May cause sweating, shakiness, confusion, weakness, or loss of consciousness.

Hypo- = low; glyc = sugar.
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Conditions

Hypokalemia

Low potassium

Potassium level lower than normal.

Also known as: Low K

Clinical note: Can affect muscle function and cardiac rhythm.

Hypo- = low; kal = potassium.
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Conditions

Hyponatremia

Low sodium

Sodium level lower than normal.

Also known as: Low Na

Clinical note: Can cause confusion, weakness, seizures, or other neurologic concerns depending on severity.

Hypo- = low; natr = sodium.
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Vital Signs

Hypothermia

Low body temperature

A body temperature below expected range.

Also known as: Low Temperature

Clinical note: Can be serious, especially in infants, older adults, exposure, or sepsis contexts.

Hypo = low; therm = heat.
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Conditions

Hypoxia

Low oxygen in tissues

Inadequate oxygen reaching body tissues.

Also known as: Low Oxygen

Clinical note: A priority concern when associated with distress or low oxygen saturation.

Hypo- = low; oxia = oxygen.
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Medical Word Parts

hyster / metr

Root meaning uterus

A medical root word that means uterus. Example: hysterectomy means removal of uterus.

Also known as: Root word; hysterectomy

Clinical note: Root words carry the main meaning of many medical terms.

hyster / metr = uterus.
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Procedures

Hysterectomy

Surgical removal of the uterus

A surgical procedure involving removal of the uterus.

Also known as: uterus removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Abbreviations

IM

Intramuscular

Medication route given into muscle.

Also known as: Into Muscle

Clinical note: Common injection route.

IM = in muscle.
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Medical Equipment

Infant warmer

Newborn warming device

Device used to help maintain newborn temperature.

Also known as: Radiant Warmer

Clinical note: Common in neonatal and delivery settings.

Infant warmer keeps newborn warm.
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Conditions

Infection

Invasion by microorganisms

A condition caused by harmful microorganisms multiplying in the body.

Also known as: Bacterial; Viral; Fungal

Clinical note: Assessment may include fever, redness, drainage, pain, swelling, or abnormal labs.

Infection = organism problem.
Anatomy

Inferior

Below

A directional term meaning below or toward the feet.

Also known as: Caudal

Clinical note: Used to compare locations in anatomy.

Inferior = lower.
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Conditions

Inflammation

Body response to injury

A protective response that can cause redness, heat, swelling, pain, and loss of function.

Also known as: Inflammatory Response

Clinical note: Not all inflammation is infection.

-itis often means inflammation.
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Lab Values

INR

International normalized ratio

A standardized clotting measurement often used with warfarin monitoring.

Also known as: Coagulation Ratio

Clinical note: Higher values can indicate increased bleeding risk depending context.

INR standardizes PT.
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Pharmacology

Insulin

Glucose-lowering hormone/medication

A hormone or medication that helps move glucose into cells.

Also known as: Blood Sugar Medication

Clinical note: Requires careful dosing, timing, and glucose monitoring.

Insulin lowers glucose.
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Medical Word Parts

inter-

Prefix meaning between

A medical prefix that means between. Example: intercostal means between ribs.

Also known as: Prefix; intercostal

Clinical note: This word part helps learners decode terms before memorizing full definitions.

inter- = between.
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Medical Word Parts

intra-

Prefix meaning within

A medical prefix that means within. Example: intravenous means within a vein.

Also known as: Prefix; intravenous

Clinical note: This word part helps learners decode terms before memorizing full definitions.

intra- = within.
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Procedures

Intubation

Tube placement into airway

Placement of a tube into the trachea to support or secure the airway.

Also known as: Airway Tube

Clinical note: Performed by trained clinicians in appropriate settings.

Intubation = tube in airway.
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Conditions

Ischemia

Reduced blood flow

Inadequate blood supply to tissue, causing reduced oxygen delivery.

Also known as: Poor Perfusion

Clinical note: Can cause pain or tissue injury depending on location.

Ischemia = not enough blood flow.
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Medical Word Parts

iso-

Prefix meaning equal or same

A medical prefix that means equal or same. Example: isotonic means same tone/concentration.

Also known as: Prefix; isotonic

Clinical note: This word part helps learners decode terms before memorizing full definitions.

iso- = equal or same.
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Abbreviations

IV

Intravenous

Medication or fluid route given into a vein.

Also known as: Into Vein

Clinical note: Common route for fluids and medications.

IV = in vein.
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Medical Equipment

IV pump

Infusion device

Medical device used to deliver fluids or medications at a controlled rate.

Also known as: Infusion Pump

Clinical note: Common in hospitals and clinical settings.

IV pump controls flow.
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Assessment

Jaundice

Yellowing of skin or eyes

Yellow discoloration often related to bilirubin buildup.

Also known as: Yellow Skin

Clinical note: Can suggest liver, bile duct, or blood breakdown issues.

Jaundice = yellow clue.
Lab Values

Ketones

Fat breakdown products

Substances produced when the body breaks down fat for energy.

Also known as: Urine/Blood Ketones

Clinical note: Can be important in diabetes and starvation states.

Ketones = fat fuel byproduct.
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Lab Values

Lactic acid

Perfusion/sepsis marker

A lab that can rise with poor tissue oxygenation, shock, sepsis, or metabolic stress.

Also known as: Lactate

Clinical note: Elevated values require clinical context.

Lactate = stress/perfusion clue.
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Procedures

Laparoscopy

Visual examination of the abdominal cavity

A procedure using a scope to visually examine the abdominal cavity.

Also known as: abdominal cavity scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Medical Word Parts

laryng

Root meaning larynx

A medical root word that means larynx. Example: laryngitis means larynx inflammation.

Also known as: Root word; laryngitis

Clinical note: Root words carry the main meaning of many medical terms.

laryng = larynx.
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Conditions

Laryngitis

Inflammation of the larynx

A medical term meaning inflammation of the larynx.

Also known as: laryng + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Laryngoscopy

Visual examination of the larynx

A procedure using a scope to visually examine the larynx.

Also known as: larynx scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Anatomy

Lateral

Away from midline

A directional term meaning farther from the center line of the body.

Also known as: Side Direction

Clinical note: Used to describe body location.

Lateral = side.
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Medical Word Parts

leuk

Root meaning white

A medical root word that means white. Example: leukocyte means white blood cell.

Also known as: Root word; leukocyte

Clinical note: Root words carry the main meaning of many medical terms.

leuk = white.
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Assessment

Level of consciousness

Alertness status

A patient's degree of wakefulness and responsiveness.

Also known as: LOC

Clinical note: Changes can indicate neurologic, metabolic, medication, oxygenation, or perfusion problems.

LOC = alertness clue.
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Lab Values

Lipase

Pancreatic enzyme lab

An enzyme often evaluated with suspected pancreatic disease.

Also known as: Pancreatic Enzyme

Clinical note: Often more pancreas-specific than amylase in many contexts.

Lipase relates to pancreas/fats.
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Procedures

Lobectomy

Surgical removal of the lobe of an organ

A surgical procedure involving removal of the lobe of an organ.

Also known as: lobe of an organ removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Abbreviations

LOC

Level of consciousness

A patient's wakefulness and responsiveness.

Also known as: Mental Status

Clinical note: Changes in LOC can be a major warning sign.

LOC = alertness status.
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Medical Word Parts

lymph

Root meaning lymph

A medical root word that means lymph. Example: lymphadenopathy means lymph node disease.

Also known as: Root word; lymphadenopathy

Clinical note: Root words carry the main meaning of many medical terms.

lymph = lymph.
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Assessment

Lymphadenopathy

Enlarged lymph nodes

Abnormal size, number, or consistency of lymph nodes.

Also known as: Swollen Nodes

Clinical note: Can be linked with infection, inflammation, or other conditions.

Lymph nodes enlarged.
Medical Word Parts

macro-

Prefix meaning large

A medical prefix that means large. Example: macrocyte means large cell.

Also known as: Prefix; macrocyte

Clinical note: This word part helps learners decode terms before memorizing full definitions.

macro- = large.
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Lab Values

Magnesium

Electrolyte/mineral

A mineral important for neuromuscular and cardiac function.

Also known as: Mg

Clinical note: Often linked with potassium and rhythm concerns.

Magnesium calms muscles/rhythm.
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Medical Word Parts

mal-

Prefix meaning bad or poor

A medical prefix that means bad or poor. Example: malnutrition means poor nutrition.

Also known as: Prefix; malnutrition

Clinical note: This word part helps learners decode terms before memorizing full definitions.

mal- = bad or poor.
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Procedures

Mastectomy

Surgical removal of the breast tissue

A surgical procedure involving removal of the breast tissue.

Also known as: breast tissue removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Anatomy

Medial

Toward the midline

A directional term meaning closer to the center line of the body.

Also known as: Midline Direction

Clinical note: Used to describe body location.

Medial = middle.
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Conditions

Meningitis

Inflammation of the meninges

A medical term meaning inflammation of the meninges.

Also known as: mening + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Medical Word Parts

meta-

Prefix meaning change or beyond

A medical prefix that means change or beyond. Example: metabolism means process of change.

Also known as: Prefix; metabolism

Clinical note: This word part helps learners decode terms before memorizing full definitions.

meta- = change or beyond.
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ABG

Metabolic acidosis

Low pH from metabolic cause

Acidosis caused primarily by low bicarbonate or another metabolic process.

Also known as: Low HCO3 Pattern

Clinical note: ABG pattern often includes low pH and low HCO3.

Metabolic follows HCO3.
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ABG

Metabolic alkalosis

High pH from metabolic cause

Alkalosis caused primarily by high bicarbonate or another metabolic process.

Also known as: High HCO3 Pattern

Clinical note: ABG pattern often includes high pH and high HCO3.

Metabolic follows HCO3.
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Medical Word Parts

micro-

Prefix meaning small

A medical prefix that means small. Example: microscope means tool to see small things.

Also known as: Prefix; microscope

Clinical note: This word part helps learners decode terms before memorizing full definitions.

micro- = small.
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Medical Word Parts

my / myo

Root meaning muscle

A medical root word that means muscle. Example: myalgia means muscle pain.

Also known as: Root word; myalgia

Clinical note: Root words carry the main meaning of many medical terms.

my / myo = muscle.
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Medical Word Parts

myel

Root meaning spinal cord or bone marrow

A medical root word that means spinal cord or bone marrow. Example: myelopathy means spinal cord disorder.

Also known as: Root word; myelopathy

Clinical note: Root words carry the main meaning of many medical terms.

myel = spinal cord or bone marrow.
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Conditions

Myocardial infarction

Heart attack

Heart muscle injury caused by reduced blood flow.

Also known as: MI; Heart Attack

Clinical note: Often evaluated with symptoms, EKG, and troponin.

Myo-cardial = heart muscle.
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Conditions

Myocarditis

Inflammation of the heart muscle

A medical term meaning inflammation of the heart muscle.

Also known as: myocard + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Assessment

Nausea

Feeling like vomiting

An uncomfortable sensation that may precede vomiting.

Also known as: Upset stomach

Clinical note: Assess vomiting, hydration, pain, medications, and associated symptoms.

Nausea = may vomit.
Conditions

Necrosis

Tissue death

Death of body tissue.

Also known as: Dead Tissue

Clinical note: Can occur from ischemia, infection, trauma, or other causes.

Necrosis = tissue death.
Medical Word Parts

neo-

Prefix meaning new

A medical prefix that means new. Example: neoplasm means new growth.

Also known as: Prefix; neoplasm

Clinical note: This word part helps learners decode terms before memorizing full definitions.

neo- = new.
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Medical Word Parts

nephr / ren

Root meaning kidney

A medical root word that means kidney. Example: nephrology means kidney specialty.

Also known as: Root word; nephrology

Clinical note: Root words carry the main meaning of many medical terms.

nephr / ren = kidney.
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Procedures

Nephrectomy

Surgical removal of the kidney

A surgical procedure involving removal of the kidney.

Also known as: kidney removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Conditions

Nephritis

Inflammation of the kidney

A medical term meaning inflammation of the kidney.

Also known as: nephr + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Anatomy

Nephron

Kidney filtering unit

The microscopic functional unit of the kidney.

Also known as: Kidney Filter

Clinical note: Filters blood and helps regulate fluid and electrolytes.

Nephron filters.
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Medical Word Parts

neur / neuro

Root meaning nerve

A medical root word that means nerve. Example: neuropathy means nerve disorder.

Also known as: Root word; neuropathy

Clinical note: Root words carry the main meaning of many medical terms.

neur / neuro = nerve.
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Conditions

Neuritis

Inflammation of the nerve

A medical term meaning inflammation of the nerve.

Also known as: neur + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Abbreviations

NPO

Nothing by mouth

Instruction that the patient should not take food or fluids by mouth.

Also known as: nil per os

Clinical note: Often used before procedures or for aspiration risk.

NPO = no oral intake.
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Medical Word Parts

odont

Root meaning tooth

A medical root word that means tooth. Example: odontology means study of teeth.

Also known as: Root word; odontology

Clinical note: Root words carry the main meaning of many medical terms.

odont = tooth.
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Medical Word Parts

oligo-

Prefix meaning few or little

A medical prefix that means few or little. Example: oliguria means low urine output.

Also known as: Prefix; oliguria

Clinical note: This word part helps learners decode terms before memorizing full definitions.

oligo- = few or little.
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Medical Word Parts

oophor

Root meaning ovary

A medical root word that means ovary. Example: oophorectomy means removal of ovary.

Also known as: Root word; oophorectomy

Clinical note: Root words carry the main meaning of many medical terms.

oophor = ovary.
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Procedures

Oophorectomy

Surgical removal of the ovary

A surgical procedure involving removal of the ovary.

Also known as: ovary removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Medical Word Parts

ophthalm / ocul

Root meaning eye

A medical root word that means eye. Example: ophthalmology means study of the eye.

Also known as: Root word; ophthalmology

Clinical note: Root words carry the main meaning of many medical terms.

ophthalm / ocul = eye.
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Pharmacology

Opioid

Strong pain medication class

A medication class used for moderate to severe pain in appropriate settings.

Also known as: Narcotic Analgesic

Clinical note: Requires monitoring for sedation and respiratory depression.

Opioids can slow breathing.
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Medical Word Parts

orchid / test

Root meaning testis

A medical root word that means testis. Example: orchitis means testicular inflammation.

Also known as: Root word; orchitis

Clinical note: Root words carry the main meaning of many medical terms.

orchid / test = testis.
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Assessment

Orientation

Awareness of person/place/time/situation

A mental status assessment of whether a patient knows who they are, where they are, time, and situation.

Also known as: A&O

Clinical note: Commonly documented as alert and oriented.

Orientation = awareness.
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Assessment

Orthopnea

Shortness of breath lying flat

Difficulty breathing when lying down.

Also known as: Needs Pillows

Clinical note: Can be associated with heart or lung conditions.

Ortho + pnea = breathing position clue.
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Lab Values

Osmolality

Concentration of particles

A measure of dissolved particles in blood or urine.

Also known as: Serum Osmolality

Clinical note: Related to fluid balance and sodium/water problems.

Osmolality = concentration.
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Medical Word Parts

oste / osteo

Root meaning bone

A medical root word that means bone. Example: osteoporosis means bone condition.

Also known as: Root word; osteoporosis

Clinical note: Root words carry the main meaning of many medical terms.

oste / osteo = bone.
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Medical Word Parts

ot / oto

Root meaning ear

A medical root word that means ear. Example: otitis means ear inflammation.

Also known as: Root word; otitis

Clinical note: Root words carry the main meaning of many medical terms.

ot / oto = ear.
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Conditions

Otitis

Inflammation of the ear

A medical term meaning inflammation of the ear.

Also known as: ot + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Otoscopy

Visual examination of the ear

A procedure using a scope to visually examine the ear.

Also known as: ear scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Medical Equipment

Oxygen flowmeter

Oxygen flow device

Device used to control oxygen flow rate from a wall source or tank.

Also known as: Flowmeter

Clinical note: Connected to oxygen delivery devices.

Flowmeter controls oxygen flow.
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EKG

P wave

Atrial depolarization

The EKG wave that represents atrial electrical activation.

Also known as: Atrial Wave

Clinical note: Important when assessing rhythm.

P wave = atria.
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EKG

PAC

Premature atrial contraction

An early beat that originates from the atria.

Also known as: Atrial Ectopic Beat

Clinical note: Often seen as an early P wave with irregular timing.

PAC = premature atrial beat.
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ABG

PaCO2

Carbon dioxide pressure

The ABG value that reflects carbon dioxide ventilation.

Also known as: CO2

Clinical note: The main respiratory value in basic ABG interpretation.

PaCO2 is respiratory.
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Assessment

Pain

Unpleasant sensory/emotional experience

A symptom that should be assessed by location, severity, quality, timing, and triggers.

Also known as: Discomfort

Clinical note: Pain assessment supports clinical judgment and reassessment.

Pain needs details.
Assessment

Pallor

Pale appearance

Paleness of skin or mucous membranes.

Also known as: Pale Skin

Clinical note: May be associated with anemia, poor perfusion, shock, or other causes.

Pallor = pale.
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Cardiology

Palpitations

Awareness of heartbeat

Feeling that the heart is racing, pounding, skipping, or irregular.

Also known as: Heart Flutter

Clinical note: May be associated with arrhythmias, anxiety, stimulants, or other causes.

Palpitations = feeling heartbeat.
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Medical Word Parts

pan-

Prefix meaning all

A medical prefix that means all. Example: pancytopenia means low counts of all blood cells.

Also known as: Prefix; pancytopenia

Clinical note: This word part helps learners decode terms before memorizing full definitions.

pan- = all.
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Medical Word Parts

pancreat

Root meaning pancreas

A medical root word that means pancreas. Example: pancreatitis means pancreas inflammation.

Also known as: Root word; pancreatitis

Clinical note: Root words carry the main meaning of many medical terms.

pancreat = pancreas.
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Conditions

Pancreatitis

Inflammation of the pancreas

A medical term meaning inflammation of the pancreas.

Also known as: pancreat + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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ABG

PaO2

Oxygen pressure

The ABG value that reflects arterial oxygen level.

Also known as: Oxygenation

Clinical note: Used to evaluate oxygenation, not to name acid-base disorder.

PaO2 tells oxygenation.
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Medical Word Parts

para-

Prefix meaning beside or abnormal

A medical prefix that means beside or abnormal. Example: paraplegia means paralysis of lower body.

Also known as: Prefix; paraplegia

Clinical note: This word part helps learners decode terms before memorizing full definitions.

para- = beside or abnormal.
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Medical Word Parts

path

Root meaning disease

A medical root word that means disease. Example: pathology means study of disease.

Also known as: Root word; pathology

Clinical note: Root words carry the main meaning of many medical terms.

path = disease.
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Medical Equipment

Patient monitor

Monitoring device

Device that displays patient parameters such as heart rate, oxygen saturation, blood pressure, and respirations.

Also known as: Bedside Monitor

Clinical note: Used to track vital signs and alarms.

Monitor shows patient data.
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Assessment

Perfusion

Blood flow to tissue

Delivery of oxygenated blood to body tissues.

Also known as: Tissue Blood Flow

Clinical note: Poor perfusion can cause cool skin, weak pulses, or altered mental status.

Perfusion = tissue blood flow.
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Medical Word Parts

peri-

Prefix meaning around

A medical prefix that means around. Example: pericardium means around the heart.

Also known as: Prefix; pericardium

Clinical note: This word part helps learners decode terms before memorizing full definitions.

peri- = around.
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Conditions

Pharyngitis

Inflammation of the throat

A medical term meaning inflammation of the throat.

Also known as: pharyng + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Lab Values

Phosphorus

Electrolyte/mineral

A mineral important for bones, energy, kidneys, and cell function.

Also known as: Phosphate

Clinical note: Often interpreted with calcium and kidney function.

Phosphorus works with calcium.
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Assessment

Pitting edema

Indenting swelling

Swelling that leaves an indentation after pressure is applied.

Also known as: Pitting Swelling

Clinical note: Often graded during assessment.

Pitting leaves a pit.
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Lab Values

Platelets

Clotting cell fragments

Blood components involved in clot formation.

Also known as: PLT

Clinical note: Low platelets can increase bleeding risk.

Platelets plug bleeding.
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Conditions

Pleuritis

Inflammation of the pleura

A medical term meaning inflammation of the pleura.

Also known as: pleur + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Pneumonectomy

Surgical removal of the lung

A surgical procedure involving removal of the lung.

Also known as: lung removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Conditions

Pneumonia

Lung infection

Infection or inflammation of lung tissue.

Also known as: Lung Infection

Clinical note: May cause fever, cough, shortness of breath, and abnormal lung sounds.

Pneumo = lung/air.
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Conditions

Pneumonitis

Inflammation of the lung

A medical term meaning inflammation of the lung.

Also known as: pneumon + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Medical Word Parts

poly-

Prefix meaning many or much

A medical prefix that means many or much. Example: polyuria means excessive urination.

Also known as: Prefix; polyuria

Clinical note: This word part helps learners decode terms before memorizing full definitions.

poly- = many or much.
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Medical Word Parts

post-

Prefix meaning after

A medical prefix that means after. Example: postoperative means after surgery.

Also known as: Prefix; postoperative

Clinical note: This word part helps learners decode terms before memorizing full definitions.

post- = after.
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Anatomy

Posterior

Toward the back

A directional term meaning toward the back of the body.

Also known as: Dorsal

Clinical note: Used to describe location in anatomy and assessment.

Posterior = back.
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Lab Values

Potassium

Major electrolyte

An electrolyte important for heart rhythm, nerves, and muscles.

Also known as: K+

Clinical note: Abnormal potassium can be dangerous for the heart.

Potassium = rhythm risk.
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EKG

PR interval

Atrial-to-ventricular conduction time

The EKG interval from the beginning of the P wave to the beginning of the QRS complex.

Also known as: PR

Clinical note: Helps evaluate AV conduction.

PR = pause before QRS.
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Medical Word Parts

pre-

Prefix meaning before

A medical prefix that means before. Example: prenatal means before birth.

Also known as: Prefix; prenatal

Clinical note: This word part helps learners decode terms before memorizing full definitions.

pre- = before.
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Abbreviations

PRN

As needed

Medication or care given when needed within ordered parameters.

Also known as: pro re nata

Clinical note: Always follow order details and facility policy.

PRN = as needed.
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Medical Word Parts

proct

Root meaning rectum/anus

A medical root word that means rectum/anus. Example: proctoscopy means visual exam of rectum/anus.

Also known as: Root word; proctoscopy

Clinical note: Root words carry the main meaning of many medical terms.

proct = rectum/anus.
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Procedures

Proctoscopy

Visual examination of the rectum/anus

A procedure using a scope to visually examine the rectum/anus.

Also known as: rectum/anus scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Procedures

Prostatectomy

Surgical removal of the prostate

A surgical procedure involving removal of the prostate.

Also known as: prostate removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Conditions

Prostatitis

Inflammation of the prostate

A medical term meaning inflammation of the prostate.

Also known as: prostat + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Anatomy

Proximal

Closer to attachment

Closer to the point where a limb or structure attaches to the body.

Also known as: Near Origin

Clinical note: Often used for arms and legs.

Proximal = closer.
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Medical Word Parts

psych

Root meaning mind

A medical root word that means mind. Example: psychology means study of the mind.

Also known as: Root word; psychology

Clinical note: Root words carry the main meaning of many medical terms.

psych = mind.
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Lab Values

PT

Prothrombin time

A coagulation test that helps evaluate clotting.

Also known as: Protime

Clinical note: Often related to warfarin monitoring and clotting status.

PT = clotting time.
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Lab Values

PTT

Partial thromboplastin time

A coagulation test that evaluates part of the clotting pathway.

Also known as: aPTT

Clinical note: Often associated with heparin monitoring depending setting.

PTT = clotting pathway test.
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Medical Word Parts

pulmon / pneumo

Root meaning lung or air

A medical root word that means lung or air. Example: pneumonia means lung infection.

Also known as: Root word; pneumonia

Clinical note: Root words carry the main meaning of many medical terms.

pulmon / pneumo = lung or air.
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Medical Equipment

Pulse oximeter

Oxygen saturation device

Device used to estimate oxygen saturation through a sensor, often on a finger.

Also known as: SpO2 Probe

Clinical note: Probe placement and perfusion can affect readings.

Pulse ox estimates oxygen saturation.
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EKG

PVC

Premature ventricular contraction

An early beat that originates from the ventricles.

Also known as: Ventricular Ectopic Beat

Clinical note: Occasional PVCs may occur, but frequency and symptoms matter.

PVC = premature ventricular beat.
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Abbreviations

QID

Four times daily

Medication or care frequency meaning four times per day.

Also known as: quater in die

Clinical note: Important abbreviation to verify according to policy.

QID = four times daily.
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EKG

QRS complex

Ventricular depolarization

The EKG complex representing ventricular electrical activation.

Also known as: Ventricular Wave

Clinical note: Width and pattern can give important clues.

QRS = ventricles.
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EKG

QT interval

Ventricular electrical cycle

The EKG interval from QRS onset to T-wave end.

Also known as: QT

Clinical note: Prolonged QT can increase rhythm risk.

QT = ventricular cycle.
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Medical Word Parts

quadri-

Prefix meaning four

A medical prefix that means four. Example: quadriplegia means paralysis of four limbs.

Also known as: Prefix; quadriplegia

Clinical note: This word part helps learners decode terms before memorizing full definitions.

quadri- = four.
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Anatomy

Radius

Forearm bone thumb side

One of the two forearm bones, located on the thumb side.

Also known as: Forearm Bone

Clinical note: Important for wrist and forearm anatomy.

Radius rotates.
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Lab Values

RBC

Red blood cell count

A lab value measuring red blood cells.

Also known as: Red Count

Clinical note: Related to oxygen-carrying capacity.

RBC carries oxygen with hemoglobin.
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Assessment

Rebound tenderness

Pain after pressure release

Pain that worsens when pressure is released during abdominal assessment.

Also known as: Rebound Pain

Clinical note: Can be a concerning abdominal finding.

Rebound = pain returns after release.
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ABG

Respiratory acidosis

Low pH from CO2 retention

Acidosis caused primarily by elevated carbon dioxide.

Also known as: High PaCO2 Pattern

Clinical note: ABG pattern often includes low pH and high PaCO2.

Respiratory follows PaCO2.
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ABG

Respiratory alkalosis

High pH from low CO2

Alkalosis caused primarily by decreased carbon dioxide.

Also known as: Low PaCO2 Pattern

Clinical note: ABG pattern often includes high pH and low PaCO2.

Respiratory follows PaCO2.
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Medical Word Parts

retro-

Prefix meaning behind or backward

A medical prefix that means behind or backward. Example: retroperitoneal means behind peritoneum.

Also known as: Prefix; retroperitoneal

Clinical note: This word part helps learners decode terms before memorizing full definitions.

retro- = behind or backward.
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Medical Word Parts

rhin

Root meaning nose

A medical root word that means nose. Example: rhinitis means nose inflammation.

Also known as: Root word; rhinitis

Clinical note: Root words carry the main meaning of many medical terms.

rhin = nose.
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Conditions

Rhinitis

Inflammation of the nose

A medical term meaning inflammation of the nose.

Also known as: rhino + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Rhinoscopy

Visual examination of the nose

A procedure using a scope to visually examine the nose.

Also known as: nose scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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Respiratory

Rhonchi

Coarse lung sound

Low-pitched, coarse breath sound often associated with secretions.

Also known as: Coarse Breath Sounds

Clinical note: May change with coughing depending on cause.

Rhonchi = rattly secretions.
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Abbreviations

RR

Respiratory rate

Number of breaths per minute.

Also known as: Respirations

Clinical note: One of the major vital signs.

RR = respiratory rate.
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ABG

SaO2

Arterial oxygen saturation

The percent of hemoglobin saturated with oxygen in arterial blood.

Also known as: Arterial Saturation

Clinical note: Often reviewed with PaO2 and clinical oxygenation status.

SaO2 = arterial saturation.
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Medical Word Parts

semi-

Prefix meaning half or partial

A medical prefix that means half or partial. Example: semicoma means partial coma.

Also known as: Prefix; semicoma

Clinical note: This word part helps learners decode terms before memorizing full definitions.

semi- = half or partial.
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Conditions

Sepsis

Severe infection response

A life-threatening organ dysfunction related to infection response.

Also known as: Systemic Infection

Clinical note: Requires urgent recognition and treatment.

Sepsis = infection emergency.
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Medical Equipment

Sequential compression device

Leg compression device

Device that inflates sleeves around the legs to help reduce clot risk.

Also known as: SCD

Clinical note: Often used for DVT prevention.

SCD squeezes legs.
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Conditions

Shock

Poor tissue perfusion

A life-threatening state where tissues do not receive enough oxygenated blood.

Also known as: Circulatory Failure

Clinical note: Requires urgent assessment and treatment.

Shock = perfusion failure.
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Procedures

Sigmoidoscopy

Visual examination of the sigmoid colon

A procedure using a scope to visually examine the sigmoid colon.

Also known as: sigmoid colon scope

Clinical note: Scope terms often involve visual examination.

-scopy = visual examination.
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EKG

Sinus bradycardia

Slow sinus rhythm

A sinus rhythm with a slower-than-expected rate.

Also known as: Slow Sinus

Clinical note: Context matters; may be normal in some people or concerning in others.

Brady = slow.
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EKG

Sinus rhythm

Normal rhythm from SA node

A rhythm that starts in the sinus node with expected rate and pattern.

Also known as: Normal Sinus Rhythm

Clinical note: Often used as the baseline rhythm for EKG learning.

Sinus rhythm starts in SA node.
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EKG

Sinus tachycardia

Fast sinus rhythm

A sinus rhythm with a faster-than-expected rate.

Also known as: Fast Sinus

Clinical note: May be caused by fever, pain, anxiety, dehydration, hypoxia, or other stressors.

Tachy = fast.
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Conditions

Sinusitis

Inflammation of the sinus

A medical term meaning inflammation of the sinus.

Also known as: sinus + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Assessment

Skin turgor

Skin recoil

How quickly skin returns to place after being gently pinched.

Also known as: Hydration Clue

Clinical note: May be used as one hydration assessment clue.

Turgor = skin recoil.
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Anatomy

Skull

Bones of the head

The bony structure that protects the brain and forms the head.

Also known as: Cranium

Clinical note: Important in head anatomy and injury assessment.

Skull protects brain.
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Abbreviations

SOB

Shortness of breath

A common abbreviation for difficulty breathing.

Also known as: Dyspnea

Clinical note: Should be assessed carefully with respiratory status.

SOB = short of breath.
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Lab Values

Sodium

Major electrolyte

An electrolyte important for fluid balance, nerves, and muscle function.

Also known as: Na+

Clinical note: High or low sodium can affect neurologic status.

Sodium moves water.
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Lab Values

Specific gravity

Urine concentration measure

A urinalysis value that reflects urine concentration.

Also known as: Urine Specific Gravity

Clinical note: Can help evaluate hydration and kidney concentrating ability.

Specific gravity = urine concentration.
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Medical Word Parts

splen

Root meaning spleen

A medical root word that means spleen. Example: splenomegaly means enlarged spleen.

Also known as: Root word; splenomegaly

Clinical note: Root words carry the main meaning of many medical terms.

splen = spleen.
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Procedures

Splenectomy

Surgical removal of the spleen

A surgical procedure involving removal of the spleen.

Also known as: spleen removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Abbreviations

SpO2

Pulse oxygen saturation

Estimated oxygen saturation measured by pulse oximetry.

Also known as: Pulse Ox

Clinical note: Probe placement, motion, perfusion, and other factors can affect readings.

SpO2 = pulse ox saturation.
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Respiratory

Sputum

Coughed-up mucus

Mucus or material coughed up from the lower airways.

Also known as: Phlegm

Clinical note: Color, amount, and odor may provide clues, but context matters.

Sputum = respiratory mucus.
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Abbreviations

SQ

Subcutaneous

Medication route given under the skin.

Also known as: SubQ; SC

Clinical note: Common for insulin and some injections.

SQ = under skin.
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EKG

ST segment

Segment after QRS

EKG segment between the QRS complex and T wave.

Also known as: ST

Clinical note: Elevation or depression can be clinically important.

ST = ischemia clue.
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Abbreviations

STAT

Immediately

Instruction meaning urgent or immediate.

Also known as: Now

Clinical note: Requires prompt attention depending on order/context.

STAT = right now.
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Medical Word Parts

stomat

Root meaning mouth

A medical root word that means mouth. Example: stomatitis means mouth inflammation.

Also known as: Root word; stomatitis

Clinical note: Root words carry the main meaning of many medical terms.

stomat = mouth.
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Conditions

Stomatitis

Inflammation of the mouth

A medical term meaning inflammation of the mouth.

Also known as: stomat + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Respiratory

Stridor

High-pitched airway sound

A high-pitched sound often associated with upper airway obstruction.

Also known as: Upper Airway Sound

Clinical note: Can be an emergency finding.

Stridor = airway red flag.
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Medical Word Parts

sub-

Prefix meaning under or below

A medical prefix that means under or below. Example: subcutaneous means under the skin.

Also known as: Prefix; subcutaneous

Clinical note: This word part helps learners decode terms before memorizing full definitions.

sub- = under or below.
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Medical Equipment

Suction regulator

Suction control device

Device used to control suction pressure for removing fluids or secretions.

Also known as: Wall Suction

Clinical note: Used with appropriate tubing and collection systems.

Suction removes fluid/secretions.
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Anatomy

Superior

Above

A directional term meaning above or toward the head.

Also known as: Cranial

Clinical note: Used to compare locations in anatomy.

Superior = higher.
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Medical Word Parts

supra-

Prefix meaning above

A medical prefix that means above. Example: suprapubic means above pubic area.

Also known as: Prefix; suprapubic

Clinical note: This word part helps learners decode terms before memorizing full definitions.

supra- = above.
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Assessment

Syncope

Fainting

Temporary loss of consciousness usually from reduced blood flow to the brain.

Also known as: Faint

Clinical note: Requires assessment of cause and safety.

Syncope = fainting.
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Medical Equipment

Syringe pump

Small-volume infusion pump

Pump designed to deliver small amounts of fluid or medication from a syringe.

Also known as: Syringe Infusion Pump

Clinical note: Used where precise low-volume infusion is needed.

Syringe pump = precise small volume.
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EKG

T wave

Ventricular repolarization

The EKG wave that represents ventricular recovery.

Also known as: Repolarization

Clinical note: T-wave changes may be clinically important in context.

T wave = recovery.
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Medical Word Parts

tachy-

Prefix meaning fast

A medical prefix that means fast. Example: tachypnea means fast breathing.

Also known as: Prefix; tachypnea

Clinical note: This word part helps learners decode terms before memorizing full definitions.

tachy- = fast.
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Conditions

Tendinitis

Inflammation of the tendon

A medical term meaning inflammation of the tendon.

Also known as: tendon + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Thoracentesis

Chest fluid removal procedure

A procedure where a needle removes fluid or air from the pleural space.

Also known as: Pleural Tap

Clinical note: -centesis means surgical puncture.

Thoracentesis = chest puncture.
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Medical Word Parts

thromb

Root meaning clot

A medical root word that means clot. Example: thrombosis means clot condition.

Also known as: Root word; thrombosis

Clinical note: Root words carry the main meaning of many medical terms.

thromb = clot.
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Conditions

Thrombosis

Clot formation

Formation of a blood clot within a blood vessel.

Also known as: Blood Clot

Clinical note: Can block circulation depending on location.

Thrombo = clot; -osis = condition.
Procedures

Thyroidectomy

Surgical removal of the thyroid

A surgical procedure involving removal of the thyroid.

Also known as: thyroid removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Anatomy

Tibia

Shin bone

The larger weight-bearing bone of the lower leg.

Also known as: Shin Bone

Clinical note: Important lower leg bone.

Tibia = shin.
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Abbreviations

TID

Three times daily

Medication or care frequency meaning three times per day.

Also known as: ter in die

Clinical note: Important abbreviation to verify according to policy.

TID = three times daily.
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Procedures

Tonsillectomy

Surgical removal of the tonsils

A surgical procedure involving removal of the tonsils.

Also known as: tonsils removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Conditions

Tonsillitis

Inflammation of the tonsils

A medical term meaning inflammation of the tonsils.

Also known as: tonsill + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Medical Word Parts

trache

Root meaning trachea

A medical root word that means trachea. Example: tracheotomy means cutting into trachea.

Also known as: Root word; tracheotomy

Clinical note: Root words carry the main meaning of many medical terms.

trache = trachea.
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Anatomy

Trachea

Windpipe

The airway tube that carries air from the throat to the bronchi.

Also known as: Windpipe

Clinical note: An important airway structure.

Trachea = air tube.
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Conditions

Tracheitis

Inflammation of the trachea

A medical term meaning inflammation of the trachea.

Also known as: trache + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Procedures

Trachelectomy

Surgical removal of the cervix

A surgical procedure involving removal of the cervix.

Also known as: cervix removal

Clinical note: Procedure terms ending in -ectomy involve removal.

-ectomy = surgical removal.
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Procedures

Tracheostomy

Surgical airway opening

A surgically created opening into the trachea.

Also known as: Trach

Clinical note: Used for airway support in specific situations.

-stomy = created opening.
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Medical Word Parts

trans-

Prefix meaning across or through

A medical prefix that means across or through. Example: transdermal means through the skin.

Also known as: Prefix; transdermal

Clinical note: This word part helps learners decode terms before memorizing full definitions.

trans- = across or through.
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Medical Word Parts

tri-

Prefix meaning three

A medical prefix that means three. Example: tricuspid means three cusps.

Also known as: Prefix; tricuspid

Clinical note: This word part helps learners decode terms before memorizing full definitions.

tri- = three.
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Assessment

Triage

Sorting by urgency

Prioritizing patients based on severity and need.

Also known as: Priority Sorting

Clinical note: Used in emergency and clinical decision-making.

Triage = who first?
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Lab Values

Troponin

Cardiac injury marker

A blood marker used to help detect heart muscle injury.

Also known as: Cardiac Troponin

Clinical note: Important in chest pain evaluation.

Troponin = heart injury marker.
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Anatomy

Ulna

Forearm bone pinky side

One of the two forearm bones, located on the pinky side.

Also known as: Forearm Bone

Clinical note: Forms part of the elbow joint.

Ulna = elbow/pinky side.
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Medical Equipment

Ultrasound

Sound-wave imaging

Imaging method using sound waves to visualize structures.

Also known as: Sonography

Clinical note: Used in many specialties including vascular, cardiac, and abdominal imaging.

Ultrasound uses sound.
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Anatomy

Ureter

Tube from kidney to bladder

A tube that carries urine from the kidney to the bladder.

Also known as: Urine Tube

Clinical note: One ureter drains each kidney.

Ureter transports urine.
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Anatomy

Urethra

Tube from bladder outward

A tube that carries urine from the bladder out of the body.

Also known as: Urine Exit Tube

Clinical note: Different from ureter.

Urethra exits.
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Conditions

Urethritis

Inflammation of the urethra

A medical term meaning inflammation of the urethra.

Also known as: urethr + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Anatomy

Valve

One-way opening

A structure that controls one-way flow through the heart or vessels.

Also known as: Heart Valve

Clinical note: Heart valves prevent backflow.

Valves control flow.
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Conditions

Vasculitis

Inflammation of the blood vessels

A medical term meaning inflammation of the blood vessels.

Also known as: vascul + -itis

Clinical note: Inflammation terms often end in -itis.

-itis = inflammation.
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Pharmacology

Vasopressor

Blood pressure-support medication

A medication that constricts blood vessels or supports blood pressure.

Also known as: Pressor

Clinical note: Used in critical care settings for shock or severe hypotension.

Vaso = vessel; pressor = pressure.
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Anatomy

Vein

Blood vessel toward heart

A vessel that carries blood back toward the heart.

Also known as: Venous Vessel

Clinical note: Usually carries deoxygenated blood except pulmonary veins.

Veins visit the heart.
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Medical Word Parts

ven / phleb

Root meaning vein

A medical root word that means vein. Example: phlebitis means vein inflammation.

Also known as: Root word; phlebitis

Clinical note: Root words carry the main meaning of many medical terms.

ven / phleb = vein.
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Medical Equipment

Ventilator

Breathing support machine

Machine that helps move air in and out of the lungs.

Also known as: Mechanical Ventilator

Clinical note: Used for patients needing ventilatory support.

Ventilator supports breathing.
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Anatomy

Ventricle

Lower heart chamber

One of the lower heart chambers that pumps blood out of the heart.

Also known as: Ventricles

Clinical note: Right and left ventricles pump blood to lungs or body.

Ventricle pumps.
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EKG

Ventricular fibrillation

Chaotic ventricular rhythm

A life-threatening rhythm with chaotic ventricular electrical activity.

Also known as: VFib

Clinical note: Requires immediate emergency response according to protocols.

VFib = chaotic ventricles.
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EKG

Ventricular tachycardia

Fast ventricular rhythm

A rapid rhythm originating from the ventricles.

Also known as: VTach

Clinical note: Can be unstable or life-threatening depending on patient condition.

VTach = fast ventricles.
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Assessment

Vomiting

Throwing up

Forceful expulsion of stomach contents.

Also known as: Emesis

Clinical note: Can cause dehydration and electrolyte changes.

Vomiting = emesis.
Lab Values

WBC

White blood cell count

A lab value measuring immune-related white blood cells.

Also known as: White Count

Clinical note: High or low values need clinical context.

WBC = immune cells.
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Respiratory

Wheezes

Musical lung sounds

High-pitched breath sounds often associated with narrowed airways.

Also known as: Wheezing

Clinical note: Commonly heard with asthma or bronchospasm.

Wheeze = narrowed airway sound.
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Abbreviations

WNL

Within normal limits

A phrase meaning findings are within expected range.

Also known as: Normal Limits

Clinical note: Use carefully and according to documentation standards.

WNL = within normal limits.
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