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Common Prefixes

Medical Terminology Common Prefixes

PrefixMeaning
a- without
an- without
anti- against or opposed to
contra- against or opposed to
de- from, down, or not
ab- away from
ad- to, toward, or near
circum- around
peri- around
dia- across or through
trans- across or through
e- out or away
ec- out or away
ex- out or away
ecto- outside
exo- outside
extra- outside
en- within
endo- within
intra- within
epi- upon
inter- between
meso- middle
meta- beyond, after, or change
para- alongside of or abnormal
retro- backward or behind
sub- below or under
infra- below or under
bi- two or both
hemi- half
semi- half
hyper- above or excessive
hypo- below or deficient
macro- large or long
micro- small
mono- one
uni- one
oligo- few or deficient
pan- all
poly- many
multi- many
quadri- four
super- above or excessive
supra- above or excessive
tri- three
ultra- beyond or excessive
ante- before
pre- before
pro- before
brady- slow
tachy- fast
post- after or behind
re- again or back
con- together or with
syn- together or with
sym- together or with
dys- painful, difficult, or faulty
eu- good or normal
neo- new
cata- down
Created by: tsuchiya
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