non-
not
nuc-
center
ob-
against
oct-
eight
ocul-
eye
odont-
tooth
olf-
smell
oligo-
few; little
omni-
all
onc-
mass; tumor
oo-
egg
orb-
circle; round; ring
-orium; -ory
place for something
orth-
straight; correct; right
oste-
bone
ov-
egg
oxy-
sharp; acid; oxygen
paleo-
old; ancient
palm-
broad; flat
pan-
all