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Definition of Dawn horse
1. Noun. Earliest horse; extinct primitive dog-sized four-toed Eocene animal. 
Exact synonyms: Eohippus
Generic synonyms: Equus Caballus, Horse
Group relationships: Genus Hyracotherium, Hyracotherium
Generic synonyms: Equus Caballus, Horse
Group relationships: Genus Hyracotherium, Hyracotherium



