Commonly Used Prefixes in Medical Terminology (Booth, 5e; Appendix I)

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Term

Definition

a-, an-

without, not

🗑

ab-

from, away

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ad-

to, toward

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ambi-, amph-, amphi-

both, on both sides, around

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ante-

before

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antero-

in front of

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anti-

against, opposing

🗑

auto-

self

🗑

twice, double

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brachy-

short

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brady-

slow

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cata-

down, lower, under

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centi-

hundred

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cephal-

head

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chol-, chole-, cholo-

gall

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chromo-

color

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circum-

around

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co-, com-, con-

together, with

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contra-

against

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cryo-

cold

🗑

de-

down, from

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deca-

ten

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deci-

tenth

🗑

demi-

half

🗑

dextro-

to the right

🗑

di-

double, twice

🗑

dia-

through, apart, between

🗑

dipla-, diplo-

double, twin

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dis-

apart, away from

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dys-

difficult, painful, bad, abnormal

🗑

e-, ec-, ecto-

away, from, without, outside

🗑

em-, en-

in, into, inside

🗑

endo-

within, inside

🗑

ento-

within, inner

🗑

epi-

on, above

🗑

erythro-

red

🗑

eu-

good

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ex-, exo-

outside of, beyond, without

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extra-

outside of, beyond, in addition

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fore-

before, in front of

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gyn-, gyno-, gyne-, gyneco-

woman, female

🗑

hemi-

half

🗑

hetero-

other, unlike

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homeo-, homo-

same, like

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hyper-

above, over, increased, excessive

🗑

hypo-

below, under, decreased

🗑

idio-

personal, self-produced

🗑

im-, in-, ir-

not

🗑

in-

in, into

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infra-

beneath

🗑

inter-

between, among

🗑

intra-, intro-

into, within, during

🗑

juxta-

near, nearby

🗑

kata-, kath-

down, lower, under

🗑

kineto-

motion

🗑

leuco-, leuko-

white

🗑

levo-

to the left

🗑

macro-

large, long

🗑

mal-

bad

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mega-, megalo-

large, great

🗑

meio-

contraction

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melan-, melano-

black

🗑

mes-, meso-

middle

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meta-

beyond

🗑

micro-

small

🗑

mio-

smaller, less

🗑

mono-

single, one

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multi-

many

🗑

neo-

new

🗑

non-, not-

🗑

nulli-

none

🗑

ob-

against

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olig-, oligo-

few, less than normal

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ortho-

straight

🗑

oxy-

sharp, acid

🗑

pachy-

thick

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pan-

all, every

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par-, para-

alongside of, with; woman who has given birth

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per-

through, excessive

🗑

peri-

around

🗑

pes-

foot

🗑

pluri-

more, several

🗑

pneo-

breathing

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poly-

many, much

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post-

afer, behind

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pre-, pro-

before, in front of

🗑

presby-, presbyo-

old age

🗑

primi-

fast

🗑

pseudo-

false

🗑

quadri-

four

🗑

re-

back, again

🗑

retro-

backward, behind

🗑

semi-

half

🗑

steno-

contracted, narrow

🗑

stereo-

sirm, solid, three-dimensional

🗑

sub-

under

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super-, supra-

above, upon, excess

🗑

sym-, syn-

with, together

🗑

tachy-

fast

🗑

tele-

distant, far

🗑

tetra-

four

🗑

tomo-

incision, section

🗑

trans-

across

🗑

tri-

three

🗑

tropho-

nutrition, growth

🗑

ultra-

beyond, excess

🗑

uni-

one

🗑

veni-

vein

🗑

xanth-, xantho-

yellow

🗑

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