Source : Webster's Revised Unabridged Dictionary (1913)

Anisodactyla \An`i*so*dac"ty*la\, Anisodactyls
\An`i*so*dac"tyls\, n. pl. [NL. anisodactyla, fr. Gr. 'a`nisos
   unequal ('an priv. + 'i`sos equal) + da`ktylos finger.]
   (Zo["o]l.)
   (a) A group of herbivorous mammals characterized by having
       the hoofs in a single series around the foot, as the
       elephant, rhinoceros, etc.
   (b) A group of perching birds which are anisodactylous.