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Any of several medium-sized leaf-eating monkeys of the genus Pygathrix of Southeast Asia, having a light-colored face surrounded by a long fringe of white hair, a dark cap, long legs, and a long tail. Also called douc langur.
[Probably from Muong (Mon-Khmer language of northern Vietnam) dộc.]
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.
(Animals) an Old World monkey, Pygathrix nemaeus, of SE Asia, with a bright yellow face surrounded by tufts of reddish-brown fur, a white tail, and white hindquarters: one of the langurs
[C18: from French, from the native name]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014