Word Parts and Structural Terms

Combining Forms

atri/o: atrium

cardi/o: heart

cusp/i: point

ech/o: sound

electr/o: electricity

symptomat/o: symptom

valv/o: valve

valvul/o: valve

vascul/o: vessel

ventricul/o: ventricle


a-: absence of, without

bi-: two

brady-: slow

endo-: within, in

epi-: on, upon, over

hyper-: above, excessive

hypo-: below, deficient

inter-: between

pan-: all, total

peri-: surrounding, around

tachy-: fast, rapid

tri-: three


ac: pertaining to (adjective)

apheresis: removal (noun)

ar: pertaining to (adjective)

centesis: surgical puncture to aspirate fluid (noun)

ectomy: excision, surgical removal (noun)

genic: producing, originating, causing (adjective)

gram: record, radiographic image (noun)

graph: instrument used to record (noun)

graphy: process of recording, radiographic imaging (noun)

ia: condition of, diseased state, abnormal state (noun)

ic: pertaining to (adjective)

itis: inflammation (noun)

lysis: loosening, dissolution, separating (noun)

megaly: enlarged, enlargement (noun)

logist: specialist, physician who studies and treats (noun)

oma: tumor (noun)

osis: abnormal condition (noun)

tomy: cut into, incision (noun)

ous: pertaining to (adjective)

pathy: disease (noun)

penia: abnormal reduction in number (noun)

pexy: surgical fixation, suspension (noun)

plasty: surgical repair (noun)

poiesis: formation (noun)

sclerosis: hardening (noun)

scope: instrument used to view (noun)

-scopy: process of viewing (noun)

stasis: stop, stopping, controlling (noun)

stenosis: narrowing, constriction (noun)

Structural Terms Built from Word Parts

atrial: pertaining to one or both atria

atrioventricular: pertaining to the atrium and ventricle

bicuspid: having two pointed folds/flaps

cardiac: pertaining to the heart

cardiogenic: originating in the heart

cardiovascular: pertaining to the heart and vessels

endocardial: pertaining to the endocardium

interatrial: pertaining to between the atria

interventricular: pertaining to between the ventricles

myocardial: pertaining to the myocardium

pericardial: pertaining to the pericardium

tricuspid: having three pointed folds/flaps

ventricular: pertaining to one or both ventricles


Icon for the Creative Commons Attribution 4.0 International License

Medical Terminology: An Interactive Approach Copyright © 2022 by LOUIS: The Louisiana Library Network is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

Share This Book