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English word zygodactyl comes from English zygo- (Pair. Union.), Ancient Greek δάκτυλος
zygo- (English)
Pair. Union.
δάκτυλος (Ancient Greek)
zygodactyl (English)
(ornithology) Any bird with toes of this kind, such as the parrot. Having two toes pointing forward, and two pointing backward; zygodactylous.