anisodactyla

from The Century Dictionary.

• In the zoölogical system of Cuvier, one of four divisions of pachydermatous quadrupeds, including those which have several unsymmetrical hoofs.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural A group of herbivorous mammals characterized by having the hoofs in a single series around the foot, as the elephant, rhinoceros, etc.
• noun plural A group of perching birds which are anisodactylous.