- 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.
Origin of eohippus
1875–80; < New Latin, equivalent to eo- eo- + Greek híppos horse
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for eohippus
Eohippus, the dawn horse, is the name given a skeleton found in 1880 in the lower Eocene strata in Wyoming.Earth and Sky Every Child Should Know
Julia Ellen Rogers
In the Lower Eocene are found the remains of a diminutive ungulate (Eohippus), of the stature of a moderately-sized dog.The Chain of Life in Geological Time
Sir J. William Dawson
The oldest of these creatures that lead to the horses is called Eohippus or beginning horse.
He would not be more astonished than would the ancient Eohippus on meeting with a modern dray-horse.Theism or Atheism
Orohippus was but little larger than Eohippus, and in most other respects very similar.Darwinism (1889)
Alfred Russel Wallace
- the earliest horse: an extinct Eocene dog-sized animal of the genus with four-toed forelegs, three-toed hindlegs, and teeth specialized for browsing
C19: New Latin, from eo- + Greek hippos horse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for eohippus
Online Etymology Dictionary, © 2010 Douglas Harper
- See hyracotherium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.