'Pliohippus' definitions:

Definition of 'Pliohippus'

From: GCIDE

Pliohippus \Pli`o*hip"pus\, n. [NL., fr. E. pliocene + Gr. ? horse.] (Paleon.) An extinct genus of horses from the Pliocene deposits. Each foot had a single toe (or hoof), as in the common horse. [1913 Webster]