Hipparion

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hipparion \Hip*pa"ri*on\, n. [NL., fr. Gr. ? a pony, dim. of ? a
     horse.] (Paleon.)
     An extinct genus of Tertiary mammals allied to the horse, but
     three-toed, having on each foot a small lateral hoof on each
     side of the main central one. It is believed to be one of the
     ancestral genera of the Horse family.