py·o·der·ma (p???-dûr?m?)n. A pyogenic skin disease.py?o·der?mic 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.pyoderma (?pa????d??m?) n (Pathology) pathol any skin eruption characterized by pustules or the formation of pusCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014