noun eohippus Extinct early Eocene mammal, Hyracotherium leporinum. 1
noun eohippus the earliest horse: an extinct Eocene dog-sized animal of the genus with four-toed forelegs, three-toed hindlegs, and teeth specialized for browsing 0
noun eohippus an extinct progenitor (genus Hyracotherium) of the modern horse, found in the Lower Eocene of W U.S.: it was about the size of a fox and had four toes on the front feet and three on the hind 0
noun eohippus An extinct early Eocene mammal, Hyracotherium leporinum. 0
