The Collaborative International Dictionary
Zygodactyl
Zygodactyl \Zyg`o*dac"tyl\, Zygodactyle \Zyg`o*dac"tyle\, n. [See Zygodactylic.] (Zo["o]l.) Any zygodactylous bird.
Wiktionary
zygodactyl
a. Having two toes pointing forward, and two pointing backward; zygodactylous. n. (context ornithology English) Any such bird (such as the parrot.)
WordNet
zygodactyl
adj. (of bird feet) having the first and fourth toes directed backward the second and third forward [ant: heterodactyl]