'Eohippus' definitions:

Definition of 'eohippus'

From: WordNet
noun
Earliest horse; extinct primitive dog-sized four-toed Eocene animal [syn: eohippus, dawn horse]

Definition of 'Eohippus'

From: GCIDE
  • Hyracotherium \Hyracotherium\ n. An extinct horse genus, formerly called genus Eohippus.
  • Syn: genus Hyracotherium. [WordNet 1.5]

Definition of 'eohippus'

From: GCIDE
  • eohippus \eo*hip"pus\ ([=e]`[-o]*h[i^]p"p[u^]s), n. [Gr. 'hw`s dawn + "ipposhorse.] an extinct primitive dog-sized 4-toed Eocene mammal, the earliest horse known in the line of descent of the modern horse. It is classed in the extinct genus Hydracotherium. Called also dawn horse.
  • Syn: dawn horse. [WordNet 1.5 +PJC]