Source : Webster's Revised Unabridged Dictionary (1913)

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.