unicorn

noun

• 1a mythical animal typically represented as a horse with a single straight horn projecting from its forehead.
• a heraldic representation of a unicorn, with a twisted horn, a deer’s feet, a goat’s beard, and a lion’s tail.

• 2 historical a carriage drawn by three horses, two abreast and one leader: she drove in her unicorn to Oakly-park
• a team of three horses arranged with two abreast and one leading: team entries comprised two fours, three unicorns, and a three-abreast