In general: the body, e.g. of a human or animal / substance; matter / form; shape / (algebra) field (commutative ring with invertible nonzero elements)

outward appearance; look; aspect

skeleton / bone

(archaic, rare) a bone, particularly a covering bone such as a skull or kneecap

remains, ashes / knack, trick

general build and appearance (of the body)

ichthyological

drowned corpse; corpse as a result of drowning

(construction) skeleton of a building or other construction

(anatomy) lens