• synonyms


[zahy-muh-juh n, -jen]
noun Biochemistry.
  1. any of various enzyme precursor molecules that may change into an enzyme as a result of catalytic change.
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Origin of zymogen

< German (1875); see zymo-, -gen
Also called proenzyme.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for zymogen

Historical Examples of zymogen

  • When in this stage, the compound is known as "proenzyme," or "zymogen."

    The Chemistry of Plant Life

    Roscoe Wilfred Thatcher

  • During ordinary secretion, however, these granules of zymogen do not entirely disappear from the cell.

    On Digestive Proteolysis

    R. H. Chittenden

  • Zymogen′ic; Zy′moid, like a ferment; Zymolog′ic, -al, pertaining to zymology.

British Dictionary definitions for zymogen


  1. biochem any of a group of compounds that are inactive precursors of enzymes and are activated by a kinase
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

zymogen in Medicine


  1. proenzyme
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.