zy·mo·sis (z?-m??s?s)n. pl. zy·mo·ses (-s?z) Archaic 1. Fermentation.2. Medicine An infectious disease or disease process having similarities to fermentation.[Greek z?m?sis, from z?moun, to leaven, from z?m?, leaven.]zy·mot?ic (-m?t??k) adj.zy·mot?i·cal·ly 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.zymosis (za??m??s?s) n, pl -ses (-si?z) 1. (Pathology) med a. any infectious diseaseb. the development process or spread of such a disease2. (Biochemistry) biochem another name for zymolysisCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014zy?mo?sis (za??mo? s?s) n., pl. -ses (-s?z). an infectious or contagious disease. [1835?45;