| heterodactyl | (adj) (of bird feet) having the first and second toes directed backward the third and fourth forward, Ant. zygodactyl |
| heterodactyl foot | (n) a bird's foot having the first and second toes of each foot directed backward and the third and fourth forward, Ant. zygodactyl foot |
| Heterodactyl | a. (Zool.) Heterodactylous. -- |
| Heterodactylae | ‖n. pl. [ NL., fr. Gr. &unr_; other + &unr_; a finger. ] (Zool.) A group of birds including the trogons. [ 1913 Webster ] |
| Heterodactylous | a. [ Hetero- + Gr. &unr_; a toe. ] (Zool.) Having the first and second toes turned backward, as in the trogons. [ 1913 Webster ] |