| Noun | 1. | Equidae - horses; asses; zebras; extinct animals mammal family - a family of mammals order Perissodactyla, Perissodactyla - nonruminant ungulates: horses; tapirs; rhinoceros; extinct forms Equus, genus Equus - type genus of the Equidae: only surviving genus of the family Equidae equid, equine - hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck genus Hyracotherium, Hyracotherium - extinct horse genus; formerly called eohippus genus Mesohippus - a genus of Equidae genus Protohippus - a genus of Equidae female horse, mare - female equine animal |