perissodactyls; odd-toed ungulates
Zoological term for the order Perissodactyla, including horses, rhinoceroses, and tapirs. Contrasts with 偶蹄類 (even-toed ungulates).
See also: 偶蹄類
Horses and rhinoceroses are classified as perissodactyls.
The difference between odd-toed and even-toed ungulates lies in the number of toes.