perissodactylPronunciation: /pɪˌrɪsə(ʊ)ˈdakt(ɪ)l/ ZoologyDefinition of perissodactyl noun a mammal of the order Perissodactyla, such as a horse or rhinoceros. adjective relating to or denoting perissodactyls. perissodactyl in other Oxford dictionaries Definition of perissodactyl in the US English dictionary