Cornu

·noun A horn, or anything shaped like or resembling a horn.

cornu
cornū, ūs (so Caes. B. C. 3, 68 Dint.; Luc. 7, 217; Plin. 28, 11, 46, § 163 et saep.; Curt. 4, 12, 1...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
cornu
cornū ūs (acc.cornum, T., O.), n (once m, C.) 1 CAR-, a horn, antler : (animantes) cornibus armata...

An Elementary Latin Dictionary