mi·to·gen (m??t?-j?n)n. An agent that induces mitosis.[mito(sis) + -gen.]mi?to·gen?ic (m??t?-j?n??k, m?t??-) adj.mi?to·ge·nic?i·ty (-j?-n?s??-t?) n.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.mitogenicity (?ma?t??d???n?s?t?) n (Biology) the quality of being mitogenicCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014