The Collaborative International Dictionary of English v.0.48:

Trophi \Tro"phi\, n. pl. [NL., fr. Gr. ? a feeder, fr. ? to
   feed.] (Zool.)
   The mouth parts of an insect, collectively, including the
   labrum, labium, maxillae, mandibles, and lingua, with their
   appendages.
   [1913 Webster]