Search Result for "heterodactyl": 
Wordnet 3.0

ADJECTIVE (1)

1. (of bird feet) having the first and second toes directed backward the third and fourth forward; 



The Collaborative International Dictionary of English v.0.48:

Heterodactyl \Het`er*o*dac"tyl\, a. (Zool.)
   Heterodactylous. -- n. One of the Heterodactyl[ae].
   [1913 Webster]


WordNet (r) 3.0 (2006):

heterodactyl
    adj 1: (of bird feet) having the first and second toes directed
           backward the third and fourth forward [ant: zygodactyl]