Source : Webster's Revised Unabridged Dictionary (1913)

Longicorn \Lon"gi*corn\, a. [L. longus long + cornu horn: cf. F.
   longicorne.] (Zo["o]l.)
   Long-horned; pertaining to the Longicornia. -- n. One of the
   Longicornia.

Source : WordNet®

longicorn
     n : long-bodied beetle having very long antennae [syn: {long-horned
         beetle}, {longicorn beetle}]