The Collaborative International Dictionary of English v.0.48:
Bicorn \Bi"corn\, Bicorned \Bi"corned\, Bicornous \Bi*cor"nous\, a. [L. bicornis; bis twice + cornu horn: cf. F. bicorne. Cf. Bickern.] Having two horns; two-horned; crescentlike. [1913 Webster]WordNet (r) 3.0 (2006):
bicorned adj 1: having two horns or horn-shaped parts; "a bicornuate uterus" [syn: bicorn, bicorned, bicornate, bicornuate, bicornuous]