noun.
A small herbivorous equid of the genus Hyracotherium (syn. Eohippus) of the Eocene Epoch, having an arched back, relatively short neck, four-toed front feet, and three-toed hind feet.
The Century Dictionary and Cyclopedia
noun.
A genus of fossil perissodactyls of the tapiroid section, referred to the family Lophiodontidæ.
the GNU version of the Collaborative International Dictionary of English
noun.
An extinct horse genus, formerly called genus Eohippus.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
extinct horse genus; formerly called eohippus