Source : Webster's Revised Unabridged Dictionary (1913)

Apodeme \Ap"o*deme\, n. [Pref. apo- + Gr. ? body.] (Zo["o]l.)
   One of the processes of the shell which project inwards and
   unite with one another, in the thorax of many Crustacea.

Source : WordNet®

apodeme
     n : ridge-like ingrowth of the exoskeleton of an arthropod that
         supports internal organs and provides attachment points
         for muscles