Unicorn n. 1.A fabulous animal with one horn; the monoceros; often represented in heraldry as a supporter.
2.A two-horned animal of some unknown kind, so called in the Authorized Version of the Scriptures. "Canst thou bind the unicorn with his band in the furrow?" Note: The unicorn mentioned in the Scripture was probably the urus. See the Note under Reem. 3.(Zool.) (a)Any large beetle having a hornlike prominence on the head or prothorax.
(b)The larva of a unicorn moth.
4.(Zool.) The kamichi; called also unicorn bird.
5.(Mil.) A howitzer. (Obs.)
Fossil unicorn, or Fossil unicorn's horn (Med.), a substance formerly of great repute in medicine; named from having been supposed to be the bone or the horn of the unicorn.
Unicorn fish, Unicorn whale (Zool.), the narwhal.
Unicorn moth (Zool.), a notodontian moth (Coelodasys unicornis) whose caterpillar has a prominent horn on its back; called also unicorn prominent.
Unicorn root (Bot.), a name of two North American plants, the yellow-flowered colicroot (Aletris farinosa) and the blazing star (Chamaelirium luteum). Both are used in medicine.
Unicorn shell (Zool.), any one of several species of marine gastropods having a prominent spine on the lip of the shell. Most of them belong to the genera Monoceros and Leucozonia.