eohippus Hear it!

eohippus definition

eo·hip·pus (ē′ō hip′əs)

noun

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

Etymology: ModL < eo- + -hippus

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