The Collaborative International Dictionary of English v.0.48:
Longicorn \Lon"gi*corn\, a. [L. longus long + cornu horn: cf. F. longicorne.] (Zool.) Long-horned; pertaining to the Longicornia. -- n. One of the Longicornia. [1913 Webster]WordNet (r) 3.0 (2006):
longicorn n 1: long-bodied beetle having very long antennae [syn: long- horned beetle, longicorn, longicorn beetle]