The Collaborative International Dictionary of English v.0.48:

Necrophagous \Ne*croph"a*gous\, a. [Gr. ? eating corpses;
   nekro`s a dead body + ? to eat: cf. F. n['e]crophage.]
   (Zool.)
   Of or pertaining to the Necrophaga; eating carrion. See
   Necrophagan.
   [1913 Webster]