Anisodactylous

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Anisodactylous \An`i*so*dac"ty*lous\, a. (Zool.)
     Characterized by unequal toes, three turned forward and one
     backward, as in most passerine birds.
     [1913 Webster]