Unicorn
From MediaWiki
A unicorn is a white horse with a horn on its head that prances around all sparkly.
Fiction
Beast Machines
Battle Unicorn is a unicorn.
Universe
Magna Stampede is a unicorn.
Animated cartoon
Professor Princess's mount was a stuffed unicorn called "Powdered Sugar". Sound and Fury SUV: Society of Ultimate Villainy
Prime cartoon
Miko Nakadai, when first hearing the name "Unicron" from the Autobots, confusedly thought they were referring to a unicorn. One Shall Rise, Part 1
