The Collaborative International Dictionary of English v.0.48:

Saprophagous \Sa*proph"a*gous\, a. (Zool.)
   Feeding on carrion.
   [1913 Webster]

WordNet (r) 3.0 (2006):

saprophagous
    adj 1: (of certain animals) feeding on dead or decaying animal
           matter [syn: saprophagous, saprozoic]