monocero

‖n. [ L., fr. Gr. &unr_;; mo`nos alone, single + ke`ras horn. ] 1. A one-horned creature; a unicorn; a sea monster with one horn. [ 1913 Webster ]

Mighty monoceroses with immeasured tails. Spenser. [ 1913 Webster ]

2. (Astron.) The Unicorn, a constellation situated to the east Orion. [ 1913 Webster ]