Artiodactyla :: Artiodactyla (n. pl.) One of the divisions of the ungulate animals. The functional toes of the hind foot are even in number, and the third digit of each foot (corresponding to the middle finger in man) is asymmetrical and paired with the fourth digit, as in the hog, the sheep, and the ox; -- opposed to Perissodactyla..
Astylar :: Astylar (a.) Without columns or pilasters.
Perissodactyla :: Perissodactyla (n. pl.) A division of ungulate mammals, including those that have an odd number of toes, as the horse, tapir, and rhinoceros; -- opposed to Artiodactyla..
Tylarus :: Tylarus (n.) One of the pads on the under surface of the toes of birds.
Zygodactylae :: Zygodactylae (n. pl.) The zygodactylous birds. In a restricted sense applied to a division of birds which includes the barbets, toucans, honey guides, and other related birds..