cephalic: adjective, Greek kephale = head. The term cephalic, as applied to the cephalic vein, was a mistranslation of Arabic and interpreted to be from the Greek term kephale = head. Arabic al-kifal = outer; the cephalic vein is on outer side of the forearm and arm (compare to basilic).
cloaca: Latin = a drain, sewer; common opening for intestinal, urinary and genital tracts in lower vertebrates, it is a transitory structure in human embryological development.
coccyx: Greek kokkyx = cuckoo, whose bill the coccyx resembles.
cochlea: Latin = snail, hence the spiral cochlea, adjective - cochlear.
corona: Latin = crown. adjective - coronary or coronal; hence a coronal plane is parallel to the main arch of a crown which passes from ear to ear (cf. coronal suture).
coronal: Latin corona = crown; hence a coronal plane is parallel to the main arch of a crown which passes from ear to ear (cf. coronal suture).
coronary: adjective, Latin = crown, hence, encircling like a crown.
coronoid: adjective, Greek korone = a crown, eidos = shape or form, hence, shaped like a crown.