n. plAnisodactyla(Zoöl) A group of herbivorous mammals characterized by having the hoofs in a single series around the foot, as the elephant, rhinoceros, etc.
Century Dictionary and Cyclopedia
anisodactylaIn the zoölogical system of Cuvier, one of four divisions of pachydermatous quadrupeds, including those which have several unsymmetrical hoofs. The term is loosely synonymous with Perissodactyla, but as originally intended it excluded the solidungulate perissodactyls, as the horse, and included some Artiodactyla, as the hippopotamus, as well as all the Proboscidea, or elephants, mastodons, and mammoths. It is an artificial group, not now in use.