Prefix
Suffix
Medical Word
Numbers
Combining Form
100

peri-

around

100

-poiesis

formation

100

afebrile

pertaining to without fever

100

poly-

many

100

infer/o

below or in a downward direction

200

inter-

between

200

-ptosis

prolapse, drooping, sagging, falling down

200

Concentration

process with, together center

200

primi-

first

200

poster/o

toward the back, back side of the body

300

intra-

within

300
-rrhage

to burst forth, bursting forth

300

Extraocular

pertaining to outside eye

300

quadri-

four

300

caud/o

pertaining to the tail, inferior in position

400

pro-

before

400

-rrhaphy

suture

400

Hypoplasia

formation under

400

uni-

one

400

dist/o

away from the point of attachment or far from the point of origin

500

supra-

above, beyond

500

-tome

instrument to cut

500

insomnia

condition not sleep

500

semi-, hemi-

half

500

medi/o

nearest the midline or middle