A Unicorn is a crytozoological creature that appears in
some form or another in many different cultures. It may be described as being
like a horse, a deer, an antelope, a donkey or even a goat. Nowadays most people
think of it a horselike creature. In all its' forms however the Unicorn has one
distinguishing feature from which it takes its name. The single horn in the
center of its forehead.

"Unicorn, fabled beast pure white in colour,
having the head and legs of a horse and a long twisted horn set in the middle of
its forehead. Symbolic of holiness and chastity, the unicorn was prominent in
tapestries of the Middle ages. It has been widely used in heraldic signs"
("Unicorn," Microsoft (R) Encarta. Coptright (c) 1994 Microsoft
Corporation.
Copyright (c) 1994 Funk & Wagnals Corporation.)
The Unicorn's horn was believed to be able to
neutralise all poisons and cups
purported to be made of it were treasured by
royalty. Such items were in fact usually made of narwhal tusk (the narwhal is a
sort of whale with a very long tooth that resembles a unicorn's horn. It is
sometimes called the sea-unicorn for this reason) or sometimes Rhino horn.
During the reign of Charles II a rhino horn cup was examined by the Royal
Soceity and disproved said superstition... with relation to rhino horn anyway.
The supposed efficacy of the Unicorn's horn was also the reason that many
drinking-cups were decorated with unicorn designs.
"UNICORN: In European mythology, a fabulous beast
with the hind parts of a deer, the tail of a lion, and the torso and head of a
horse. It derived its name from its single horn which, when dipped in water, was
thought to purify it from noxious substances. The unicorn loved innocence and
purity, and hunters could catch it only by placing a virgin in its path, since
the unicorn would always run to her, lie down at her feet and fall asleep.
Medieval commentators on the Bible believed that the unicorn represents Jesus
conceived of the Virgin Mary. " "Unicorn" The Illustrated
Encyclopedia of Myths & Legends Copyright (C) Marshall Editions Ltd 1989.
One distinguishing feature of the Unicorn is the fact
that even when it is depicted as basically being a horse with a horn it does
differ from the horse in one other particular. The Unicorn has cloven hooves
that resemble those of the deer or antelope.
Unicorns also show up in the Bible. The Unicorn is the
symbol given by God to the tribe of Ephraim (one of the twelve tribes).
Unicorns are found in Chinese literature. Referenced
many times in the Monkey King.
Unicorns were almost hunted into extinction.