The Collaborative International Dictionary of English v.0.48:

Syndactyle \Syn*dac"tyle\, n. [Pref. syn- + Gr. ? finger, toe:
   cf. F. syndactyle.] (Zool.)
   Any bird having syndactilous feet.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Syndactyl \Syn*dac"tyl\, Syndactyle \Syn*dac"tyle\, a. [Syn- +
   Gr. ? finger, toe.] (Zool. & Med.)
   Having two or more digits wholly or partly united. See
   Syndactylism.
   [Webster 1913 Suppl.]