ETYM Old Eng. unicorne, French unicorne, Latin unicornis one-horned, having a single horn; unus one + cornu a horn; cf. Latin unicornuus a unicorn. Related to One, and Horn.
An imaginary creature represented as a white horse with a long horn growing from its forehead.
Mythical animal referred to by classical writers, said to live in India and resembling a horse, but with one spiraled horn growing from the forehead.
It was especially important in medieval Christian symbolism and lore.