Source : Webster's Revised Unabridged Dictionary (1913)

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