• synonyms


[hahy-ruh-koh-theer-ee-uh m]
noun, plural hy·ra·co·the·ri·a [hahy-ruh-koh-theer-ee-uh] /ˌhaɪ rə koʊˈθɪər i ə/
  1. eohippus.
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Also hy·ra·co·there [hahy-ruh-koh-theer] /ˈhaɪ rə koʊˌθɪər/.

Origin of hyracotherium

< New Latin (1840): a genus name; see hyrax, -o-, -there
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hyracotherium

Historical Examples

  • Hyracotherium leporinum, Palaeotherium and a few other mammals are recorded.

    Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 8


  • In the Tapir (fig. 106, A) and Hyracotherium the fifth digit is fully developed but is scarcely functional.

    The Vertebrate Skeleton

    Sidney H. Reynolds

hyracotherium in Science


Plural hyracotheria
  1. A small primitive horse that lived about 50 million years ago during the early Eocene Epoch. It had three or four hoofed toes on each foot and is considered by some to be the ancestor of modern horses. It is sometimes called the “dawn horse,” a translation of its earlier scientific name, Eohippus.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.