cayuse

noun

1. Western U.S. a horse, especially an Indian pony.
2. Also called cayuse wind. Northwestern U.S. a cold wind blowing from the east.

noun, plural Cay·us·es, (especially collectively) Cay·use.

1. a member of a tribe of North American Indians now living in Oregon.

noun

1. Western US and Canadian a small Native American pony used by cowboys

n.

“horse, Indian pony,” 1841, American English, said to be a Chinook (native Pacific Northwest) word; also the name of an Indian group and language (1825), of unknown origin.