{ ‖ } 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 ]