endopodite

from The Collaborative International Dictionary of English v.0.48

Endopodite \En*dop"o*dite\, n. [Endo- + Gr. poy`s, podo`s, a
   foot.] (Zo["o]l.)
   The internal or principal branch of the locomotive appendages
   of Crustacea. See {Maxilliped}.
   [1913 Webster]