heterodactylous


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het·er·o·dac·tyl

 (hĕt′ə-rō-dăk′təl) also het·er·o·dac·ty·lous (-tə-ləs)
adj.
Having a zygodactyl foot in which the third and fourth toes project forward and the first and second toes project backward, as in the trogons.

het′er·o·dac′ty·ly (-tə-lē) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

heterodactylous

(ˌhɛtərəʊˈdæktɪləs)
adj
(Zoology) having or relating to heterodactyl feet
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014