Medical Prefixes with Definitions A–Z

A comprehensive set of common medical prefixes with their meanings for quick study.

a-, an-

without, not

ab-

away from

ad-

toward, to

ante-

before, in front of

anti-

against

auto-

self

bi-

two, double

brady-

slow

circum-

around

contra-

against, opposite

cyan-

blue

de-

down, away, reversal

dia-

through, across

dys-

painful, difficult, abnormal

ecto-, exo-

outside, outward

endo-

within, inner

epi-

upon, over, above

eu-

normal, good

hema-, hemato-

blood

hemi-

half

hyper-

above, excessive

hypo-

below, deficient

in-, im-

not, into

infra-

below

inter-

between

intra-

within

macro-

large

mal-

bad, poor

mega-, megalo-

large, great

micro-

small

mono-

one

multi-

many

neo-

new

nulli-

none

oligo-

few, scanty

pan-

all

para-

beside, near, abnormal

peri-

around

poly-

many, much

post-

after

pre-

before

pro-

before, forward

re-

again, back

retro-

backward, behind

semi-

half, partial

sub-

under, below

super-, supra-

above, excessive

tachy-

fast, rapid

trans-

across, through

tri-

three

ultra-

beyond, excess

uni-

one