from the GNU version of the Collaborative International Dictionary of English
- n.pl. A group of large, extinct, herbivorous mammals, common in the Tertiary formation of the United States.
from The Century Dictionary and Cyclopedia
- A suborder of Eocene mammals belonging to the Subungulata, or many-toed hoofed quadrupeds, of elephantine proportions and structure of the limbs.
Sorry, no etymologies found.