Medical Terminology: Prefixes

a-

no, not, without

ab-

away from

ad-

to, toward, into

ambi-

both

an-

absence of, without, not

ana-

up, apart

anti-

against, opposing

bi-

two, twice, double

circum-

around

dia-

complete, through, across

dys-

difficult, painful, bad

endo-

in, within

epi-

on, upon, above

hetero-

other, different

homeo-

same, constant

homo-

same, alike

hyper-

above, excessive

hypo-

below, deficient, under

infra-

beneath, below

intra-

in, within

macro-

large

mal-

bad, difficult

micro-

small

mono-

onem

multi-

many

nulli-

none

para-

next to, beside

peri-

around

poly-

many, much

post-

after

pre-

before, in front of

pro-

before, in front of

psuedo-

false

quad-

four

quadri-

four

retro-

backward, behind

sub-

below, under, underneath

super-

above, excessive, over

supra-

above

syn-

union, together, joined

trans-

across, through

tri-

three

ultra-

excess, beyond

uni-

one