zy·mol·y·sis (z?-m?l??-s?s)n. Fermentation.zy?mo·lyt?ic (-m?-l?t??k) 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.