Akademik
occi - oost
occipital notch
occipital point
occludent margin
occludent teeth
ocellus
ocular acicle
ocular bulla
ocular lobe
ocular papilla
ocular peduncle
ocular plate
ocular scale
ocular sinus
ocular spine or projection
ocular stylet
oil sac
olfactory hair
olfactory seta
ommatidia
ommatidium
ontogenic