The Collaborative International Dictionary of English v.0.48:

anisodactyla \an`i*so*dac"ty*la\
   ([a^]n`[-i]*s[-o]*d[a^]k"t[i^]*l[.a]), anisodactyls
\an`i*so*dac"tyls\ ([a^]n`[-i]*s[-o]*d[a^]k"t[i^]lz), n. pl.
   [NL. anisodactyla, fr. Gr. 'a`nisos unequal ('an priv. +
   'i`sos equal) + da`ktylos finger.] (Zool.)
   (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.
       [1913 Webster]