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- perissodactyl⇄adj. having an uneven number of toes.
- perissodactyl⇄noun any one of a large order of quadruped mammals having an odd number of hoofed toes on each foot, the third being the largest and sometimes the only functional one. Horses, tapirs, and rhinoceroses belong to this order.
- perissodactyl⇄perissodactyl orperissodactyle, noun, adjective.
(Zoology.)