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Any member of the ungulate family Equidae, which includes the modern horses, zebras, and asses, all in the genus Equus, as well as more than 60 species known only from fossils. Equines descended from the dawn horse (seeEohippus). Wild horses, which once inhabited much of northern Eurasia, were smaller and had shorter legs than their domesticated descendants. See alsoPrzewalski's horse.
This entry comes from Encyclopædia Britannica Concise. For the full entry on equine, visit Britannica.com.