quarter horse

any of a breed of light, muscular horse of a solid, usually dark color: because of its quick reactions it is much used in Western range work and in rodeos

Origin: after its great sprinting speed at a quarter of a mile

See quarter horse in American Heritage Dictionary 4

noun
One of a breed of strong saddle horses developed in the western United States.

Origin:

Origin: From its formerly being trained for races up to a quarter mile

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quarter horse

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