from the GNU version of the Collaborative International Dictionary of English
- n. A genus of large extinct mammals from the miocene strata of western North America. They were allied to the rhinoceros, but the skull bears a pair of powerful horn cores in front of the orbits, and the fore feet were four-toed. See Illustration in Appendix.
from The Century Dictionary and Cyclopedia
- n. A genus of gigantic extinct perissodactyls, typical of the family Brontotheriidæ.
Sorry, no etymologies found.