Medical Terminology Common Prefixes

Front 1

epi-

Back 1

upon, over

Front 2

eso-

Back 2

inward

Front 3

eu-

Back 3

normal, good

Front 4

ex-

Back 4

external, outward

Front 5

exo-

Back 5

outward

Front 6

extra-

Back 6

outside of

Front 7

hetero-

Back 7

different

Front 8

homo-

Back 8

same

Front 9

hydro-

Back 9

water

Front 10

hyper-

Back 10

over, above

Front 11

hypo-

Back 11

under, below

Front 12

in-

Back 12

not, inward

Front 13

inter-

Back 13

among, between

Front 14

intra-

Back 14

within, inside

Front 15

macro-

Back 15

large

Front 16

micro-

Back 16

small

Front 17

myo-

Back 17

to shut

Front 18

neo-

Back 18

new

Front 19

pan-

Back 19

all

Front 20

para-

Back 20

beside, near, abnormal, apart from, along the side of

Front 21

ultra-

Back 21

beyond

Front 22

per-

Back 22

through

Front 23

peri-

Back 23

around

Front 24

post-

Back 24

after

Front 25

pre-

Back 25

before

Front 26

pro-

Back 26

before

Front 27

pseudo-

Back 27

false

Front 28

retro-

Back 28

backward, behind

Front 29

sub-

Back 29

below, under

Front 30

supra-

Back 30

above

Front 31

tacky-

Back 31

rapid, fast

Front 32

trans-

Back 32

through, across

Front 33

ultra-

Back 33

beyond, excess

Front 34

un-

Back 34

not

Front 35

allo-

Back 35

other, different from usual

Front 36

xeno-

Back 36

strange, foreign

Front 37

ab-

Back 37

away from

Front 38

ad-

Back 38

toward

Front 39

circum-

Back 39

around

Front 40

e-

Back 40

outward, without

Front 41

in-

Back 41

inward, without

Front 42

a-

Back 42

without, away from

Front 43

an-

Back 43

without

Front 44

ante-

Back 44

before, in front of

Front 45

anti-

Back 45

against

Front 46

auto-

Back 46

self

Front 47

brady-

Back 47

slow

Front 48

contra-

Back 48

against

Front 49

de-

Back 49

without

Front 50

dys-

Back 50

painful, difficult, abnormal

Front 51

endo-

Back 51

within, inner

Front 52

bi-

Back 52

two

Front 53

hemi-

Back 53

half

Front 54

mono-

Back 54

one

Front 55

multi-

Back 55

many

Front 56

nulli-

Back 56

none

Front 57

poly-

Back 57

many

Front 58

primi-

Back 58

first

Front 59

quadri-

Back 59

four

Front 60

semi-

Back 60

partial, half

Front 61

tetra-

Back 61

four

Front 62

tri-

Back 62

three