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anisodactylous

[an-ahy-suh-dak-tl-uh s, an-ahy-]
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adjective
  1. Zoology. having the toes unlike, or unequal in number.
  2. Ornithology. having three toes directed forward and one backward.
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Also an·i·so·dac·tyl.

Origin of anisodactylous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for anisodactyl

anisodactyl

adjective Also: anisodactylous
  1. (of the feet of passerine birds) having the first toe directed backwards and the other three toes directed forwards
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noun
  1. a bird having this type of feet
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012