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1. Of or relating to a group of taxa that includes the common ancestor of all the members as well as all descendants of that ancestor.
2. Of or derived from one stock or source.
mon′o·phy′ly (mŏn′ə-fī′lē, mə-nŏf′ə-lē) adv.
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.
1. (Biology) relating to or characterized by descent from a single ancestral group of animals or plants
2. (Biology) (of animals or plants) of or belonging to a single stock
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014