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Medical Word Parts - Letter: o
Term
Definition
ob-
against
obstetr/o
midwife
oct-
eight
ocul/o
eye
odont/o
tooth
odyn-
pain
-oid
resembling
-ole
small, little
oleo-
oil
olfact/o
smell
olig/o
few, scanty
om/o
shoulder
-oma
tumor, neoplasm
omphal/o
umbilicus (navel)
onc/o
swelling, tumor
onych/o
fingernail, toenail
oophor/o
ovary
ophry/o
eyebrow
ophthalm/o
eye
-opia
vision condition
opisth-
behind
-opsy
process of viewing
opt/o
eye, vision
or/o
mouth
orchid/o
testicles
-orexia
appetite
organ/o
organ
ori-
mouth
orth/o
straight
osche/o
scrotum
oscill/o
swing
-ose
a carbohydrate
-osis
abnormal condition
osm/o
sense of smell
oss/e
bone
oss/i
bone
oste/o
bone
ot/o
ear, hearing
-ous
pertaining to
ov/o
egg, ovum
ovari/o
ovary
ox/i
oxygen
ox/o
oxygen
oxa-
oxygen
oxy-
sharp, oxygen