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.zymotic (za??m?t?k) adj1. (Biochemistry) biochem of, relating to, or causing fermentation2. (Pathology) pathol relating to or caused by infection3. (Pathology) pathol denoting or relating to an infectious disease zy?motically advCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014zymotic1. caused by or causing fermentation.2. causing or referring to infectious diseases.See also: Fermentation-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.