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..
Zygodactylous :: Zygodactylous (a.) Yoke-footed; having the toes disposed in pairs; -- applied to birds which have two toes before and two behind, as the parrot, cuckoo, woodpecker, etc..