Definitions

1. noun

an extinct genus of horse-like animals, typically with four toes on the front feet and three on the hind feet, that lived during the late Oligocene and early Miocene epochs

“The team of paleontologists discovered the fossilized remains of a hipparion in the desert.”

2. noun

a genus of horse-like mammals that lived during the Oligocene and early Miocene epochs

“The hipparion is a significant discovery in the field of paleontology.”