n.
Pronunciation: ˌ ē - ō - ' hi-p ə s
Function: noun
Etymology: New Latin, from eo- + Greek hippos horse ― more at EQUINE
Date: circa 1879
: any of a genus ( Hyracotherium syn. Eohippus ) of very small primitive horses from the Lower Eocene having 4-toed forefeet and 3-toed hind feet ― called also dawn horse