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Any of various large, thick-skinned, hoofed mammals such as the elephant, rhinoceros, or hippopotamus.
[French pachyderme, from New Latin Pachydermata, former order name, from Greek pakhudermos, thick-skinned : pakhus, thick + derma, skin; see derma1.]
pach′y·der′mal, pach′y·der′mic, pach′y·der′mous adj.
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.
(Pathology) pathol having an abnormal thickening of the skin
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014