Cephalotheca: the united head and thorax of arachnids and crustacea {Scanner's note: nowadays this term is used little if at all. It does not seem ever to have been popular. Instead the terms cephalothorax or prosoma are widely used.} : that portion of an obtect pupa covering head and thorax: the anterior segments of larva that have no obviously separated head.
Cerago: bee-bread.
Ceratheca or Ceratotheca: that portion of the pupal shell that envelops the antenna.
Cerci: two lateral anal appendages; usually short, jointed, antenna- like, developed from the eleventh abdominal segment of the embryo; sometimes unjointed and specialized into forceps or other processes.
Cercopoda: jointed foot-like appendages of the last abdominal segment; also applied like cerci.
Cercus: see cerci.
Cerebellum: has been applied to the sub-esophageal ganglion.
Cerebrum: the supra-oesophageal ganglion.
Cernuous: bent: with the apex bent downward.
Cervical: relating or belonging to the neck.