Medical Terminology Prefixes

Front 1

a,an-

Back 1

no, not, without

Front 2

ab-

Back 2

away from

Front 3

ad-

Back 3

toward, near

Front 4

ana-

Back 4

up, apart

Front 5

ante-

Back 5

before, forward

Front 6

anti-

Back 6

against

Front 7

bi-

Back 7

two, both

Front 8

brady-

Back 8

slow

Front 9

con-

Back 9

with, together

Front 10

dia-

Back 10

complete, through

Front 11

dys-

Back 11

bad, painful, difficult, abnormal

Front 12

ec-

Back 12

out, outside

Front 13

endo-

Back 13

within, in, inner

Front 14

epi-

Back 14

above, upon

Front 15

ex/extra-

Back 15

out, outside of

Front 16

hemi-

Back 16

half

Front 17

hyper-

Back 17

excessive, too much, above

Front 18

hypo-

Back 18

deficient, too little, below

Front 19

in-

Back 19

in, into

Front 20

inter-

Back 20

between

Front 21

intra-

Back 21

within

Front 22

mal-

Back 22

bad

Front 23

meta-

Back 23

change, beyond

Front 24

neo-

Back 24

new

Front 25

para-

Back 25

beside, near, along the side of

Front 26

peri-

Back 26

surrounding

Front 27

poly-

Back 27

many, much

Front 28

post-

Back 28

after, behind

Front 29

pre-

Back 29

before

Front 30

pro/pros-

Back 30

before, forward

Front 31

quadri-

Back 31

four

Front 32

re/retro-

Back 32

back, behind

Front 33

sub-

Back 33

under, less than

Front 34

syn-

Back 34

with, together

Front 35

tachy-

Back 35

fast

Front 36

trans-

Back 36

across, through

Front 37

tri-

Back 37

three

Front 38

ultra-

Back 38

beyond

Front 39

uni-

Back 39

one