The Collaborative International Dictionary
Heterodactyl
Heterodactyl \Het`er*o*dac"tyl\, a. (Zo["o]l.) Heterodactylous. -- n. One of the Heterodactyl[ae].
Wiktionary
heterodactyl
a. (context zoology English) heterodactylous
WordNet
heterodactyl
adj. (of bird feet) having the first and second toes directed backward the third and fourth forward [ant: zygodactyl]