hyracotherium

n.

1.

An extinct horse genus, formerly called genus Eohippus.

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hyracotherium  (hr-k-thîr-m)

Plural hyracotheria

A small primitive horse that lived about 50 million years ago during the early Eocene Epoch. It had three or four hoofed toes on each foot and is considered by some to be the ancestor of modern horses. It is sometimes called the "dawn horse," a translation of its earlier scientific name, Eohippus.

Thesaurus

Noun

1.

Hyracotherium - extinct horse genus; formerly called eohippus genus Hyracotherium mammal genus - a genus of mammals Equidae, family Equidae - horses; asses; zebras; extinct animals dawn horse, eohippus - earliest horse; extinct primitive dog-sized four-toed Eocene animal