From 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]