Fossil unicorn

Unicorn \U"ni*corn\, n. [OE. unicorne, F. unicorne, L. unicornis
   one-horned, having a single horn; unus one + cornu a horn;
   cf. L. unicornuus a unicorn. See {One}, and {Horn}.]
   1. A fabulous animal with one horn; the monoceros; -- often
      represented in heraldry as a supporter.
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   2. A two-horned animal of some unknown kind, so called in the
      Authorized Version of the Scriptures.
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            Canst thou bind the unicorn with his band in the
            furrow?                               --Job xxxix.
                                                  10.
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   Note: The unicorn mentioned in the Scripture was probably the
         urus. See the Note under {Reem}.
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   3. (Zool.)
      (a) Any large beetle having a hornlike prominence on the
          head or prothorax.
      (b) The larva of a unicorn moth.
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   4. (Zool.) The kamichi; -- called also {unicorn bird}.
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   5. (Mil.) A howitzer. [Obs.]
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   {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}.
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