1) Ancestor of the horse 2) Ancestor of the modern horse 3) Dawn horse 4) Equus caballus 5) Horse 
Eohippus is an extinct genus of small equid ungulates. The only species is E. angustidens, which was long considered a species of Hyracotherium. Its remains have been identified in North America and date to the Early Eocene (Ypresian) stage. ==Discovery== In 1876, Othniel C. Marsh described a skeleton as Eohippus validus, from the Greek ηώς (e
genus of ancestral horse. See dawn horse.
Eohippus meaning dawn horse) is the genus of the earliest-known horse. Another name for this genus is Hyracotherium. It dates from the early Eocene Epoch and lived in the Northern hemisphere (Asia, Europe, and N. America). It was 2 feet (60 cm) long and 8 inches (20 cm) high at the shoulder (the size of a small dog!). It had a long skull with 44 lo...
[n] - earliest horse
Eohippus A small prehistoric horse that lived in North America. It was dog-sized and had four toes on the front feet and three on the back feet.
dawn horse noun earliest horse; extinct primitive dog-sized four-toed Eocene animal
small (14"), earliest (prehistoric) ancestor of the modern day horse.
the earliest known horse, a member of the extinct genus Hyracotherium (Eohippus), from the early Eocene Epoch of the Northern Hemisphere; a terrier-sized herbivore having four hoofed toes on each forefoot and three on each hind foot, and low-crowned teeth. Also called