from the GNU version of the Collaborative International Dictionary of English
- n. An extinct mammal of the Horse family, but not larger than a sheep, and having three toes on each foot.
from The Century Dictionary and Cyclopedia
- n. A genus of very small three-toed horses, of the family Equidæ founded by Marsh in 1875 upon remains from the early Miocene of North America.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. North American three-toed Oligocene animal; probably not directly ancestral to modern horses
Sorry, no etymologies found.