D defs.my
Entry 1 sense Webster, 1913

Hipparion

· Hip·pa·ri·on · IPA
01 n. 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…
  1. 1.
    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.(Paleon.)