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Related to eohippus: Daedal
hoofed, herbivorous mammal now represented by a single extant genus, Equus. The term horse commonly refers only to the domestic Equus caballus and to the wild Przewalski's horse.
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a genus of primitive fossil mammals of the family Equidae. Eohippus, which lived in the early Eocene, measured approximately 0.5 m in length and had tetradactyl forehooves. The animal was similar to Hyracotherium. Remains of Eohippus have been found in deposits in North America.