单词：anisodactyls
a. (鸟爪)不等趾的(脚上诸趾不均等, 尤指鸟爪的一趾向后三趾向前)
n. 不等趾鸟
having the hoofs in a single series around the foot, as the elephant,
rhinoceros, etc.
n. pl. A group of perching birds which are
anisodactylous.
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