Prefixes -- Building A Medical Vocabulary

Front 1

a-

Back 1

no
not
without

Front 2

ab-

Back 2

away from

Front 3

ad-

Back 3

toward

Front 4

an-

Back 4

no
not
without

Front 5

ante-

Back 5

before

Front 6

anti-

Back 6

against

Front 7

bi-

Back 7

two

Front 8

brady-

Back 8

slow

Front 9

centi-

Back 9

one hundred
1/100th

Front 10

circum-

Back 10

around

Front 11

contra-

Back 11

against

Front 12

de-

Back 12

down from

reversing

Front 13

di-

Back 13

two

Front 14

dia-

Back 14

through

Front 15

diplo-

Back 15

double

Front 16

dys-

Back 16

painful
bad
difficult

Front 17

ecto-

Back 17

without
out
away from

Front 18

en-

Back 18

inside

Front 19

end-

Back 19

inside

Front 20

endo-

Back 20

inside

Front 21

epi-

Back 21

above

on

Front 22

eu-

Back 22

good or normal

Front 23

ex-

Back 23

out
without
away from

Front 24

exo-

Back 24

out
without
away from

Front 25

extra-

Back 25

out
without
away from

Front 26

hemi-

Back 26

half or partly

Front 27

hyper-

Back 27

excessive

more than normal

Front 28

hypo-

Back 28

beneath

below normal

Front 29

in-

Back 29

not

inside

Front 30

infra-

Back 30

beneath

under

Front 31

inter-

Back 31

between

Front 32

intra-

Back 32

within

Front 33

ipsi-

Back 33

same

Front 34

macro-

Back 34

large or great

Front 35

mal-

Back 35

bad

Front 36

medio-

Back 36

middle

Front 37

mega-

Back 37

large or great

Front 38

megalo-

Back 38

large or great

Front 39

meso-

Back 39

middle

Front 40

meta-

Back 40

change

next (as in a series)

Front 41

mid-

Back 41

middle

Front 42

micro-

Back 42

small

Front 43

milli-

Back 43

one thousandth

1/1000

Front 44

mono-

Back 44

one

Front 45

multi-

Back 45

many

Front 46

nulli-

Back 46

none

Front 47

pan-

Back 47

all

Front 48

para-

Back 48

near
beside
abnormal

Front 49

per-

Back 49

through

by

Front 50

peri-

Back 50

around

Front 51

pes-

Back 51

foot

Front 52

poly-

Back 52

many

Front 53

post-

Back 53

after

behind

Front 54

pre-

Back 54

before

Front 55

primi-

Back 55

first

Front 56

pro-

Back 56

favoring
supporting
for
before

Front 57

quad-

Back 57

four

Front 58

quadri-

Back 58

four

Front 59

retro-

Back 59

behind

backward

Front 60

semi-

Back 60

half

partly

Front 61

sub-

Back 61

beneath

under

Front 62

super-

Back 62

above
beyond
excessive

Front 63

supra-

Back 63

above

beyond

Front 64

sym-

Back 64

joined

together

Front 65

syn-

Back 65

joined

together

Front 66

tachy-

Back 66

fast

Front 67

tetra-

Back 67

four

Front 68

trans-

Back 68

across

Front 69

tri-

Back 69

three

Front 70

ultra-

Back 70

excessive

Front 71

uni-

Back 71

one

Front 72

pseudo-

Back 72

false

Front 73

pseudo-

Back 73

false

Front 74

idio-

Back 74

individual