from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A small herbivorous mammal of the genus Hyracotherium (syn. Eohippus) from the Eocene Epoch of North America, having four-toed front feet and three-toed hind feet and related ancestrally to the modern horse.
New Latin Hyracothērium, genus name : hyrax, hyrac-, hyrax (from certain shared skeletal characteristics); see hyrax + Greek thērion, wild beast; see treacle.(American Heritage® Dictionary of the English Language, Fourth Edition)