• synonyms


noun Biochemistry.
  1. any of a group of proteins that are converted to active enzymes by partial breakdown, as by the action of an acid or other enzyme.
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Origin of proenzyme

First recorded in 1895–1900; pro-1 + enzyme
Also called zymogen.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for proenzyme

Historical Examples of proenzyme

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

    The Chemistry of Plant Life

    Roscoe Wilfred Thatcher

British Dictionary definitions for proenzyme


  1. the inactive form of an enzyme; zymogen
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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

proenzyme in Medicine


  1. The inactive or nearly inactive precursor of an enzyme, converted into an active enzyme by proteolysis.zymogen
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.