from the GNU version of the Collaborative International Dictionary of English
- n.pl. A group of hoofed mammals distinguished for the thickness of their skins, including the elephant, hippopotamus, rhinoceros, tapir, horse, and hog; the pachyderms. It is now considered an artificial group.
from The Century Dictionary and Cyclopedia
- The non-ruminant ungulate mammals, or hoofed quadrupeds which do not chew the cud; in Cuvier's classification, the seventh order of Mammalia, divided into Proboscidea, Ordinaria, and Solidungula.
Sorry, no etymologies found.