Definition of "mesohippus" []

• An extinct mammal of the Horse family, but not larger than a sheep, and having three toes on each foot. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "This mesohippus, c. 40mya apparently looks like a modern horse to Bob."
• "By about 30 mya, the mesohippus, a collie-dog-Sized, horselike animal, became typical of the medium-sized mammals appearing in the record."
• "And then, about thirty million years ago, when the land that was to form the twin pillars was being laid down, mesohippus developed, twenty-four inches high at the shoulders and with all the basic characteristics of his ancestors, except that he had only three toes on each of his feet."