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An aquatic opossum (Chironectes minimus) of tropical regions of the Americas, having dense fur, webbed hind feet, and a long tail.
[After the Oyapock, a river of northern South America.]
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 aquatic opossum, Chironectes minimus, having webbed feet and living in South America
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014