Mō-nŏç'-e-rŏs, n.

n. [Lat., Gr. μονοκέρωσ, from μόνος, alone, single, and κέρας, horn.]

1. A one-horned creature; a unicorn; a sea-monster with one horn; perhaps the sword-fish. [Obs.] “Mighty monoceros with immeasured tail.” Spenser.
2. (Astron.) The Unicorn, a constellation situated to the east of Orion.