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[proh-tee-ol-uh-sis] /ˌproʊ tiˈɒl ə sɪs/
noun, Biochemistry.
the breaking down of proteins into simpler compounds, as in digestion.
Origin of proteolysis
1875-80; proteo- (combining form representing protein) + -lysis
Related forms
[proh-tee-uh-lit-ik] /ˌproʊ ti əˈlɪt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for proteolysis
Contemporary Examples
Historical Examples
  • Further, the pancreatic juice is a remarkably active fluid, and proteolysis under its influence must make rapid strides.

    On Digestive Proteolysis R. H. Chittenden
  • This brings us to a very important point in connection with the utilization by the system of the ordinary products of proteolysis.

    On Digestive Proteolysis R. H. Chittenden
  • They can only utilize the proteid material elaborated from the products of proteolysis by other agencies.

    On Digestive Proteolysis R. H. Chittenden
  • The combined acid, however, must be hydrochloric acid, if proteolysis is to be at all marked.

    On Digestive Proteolysis R. H. Chittenden
  • Pepsin-proteolysis, therefore, is strictly the proteolysis produced by pepsin-acid.

    On Digestive Proteolysis R. H. Chittenden
British Dictionary definitions for proteolysis


the hydrolysis of proteins into simpler compounds by the action of enzymes: occurs esp during digestion
Derived Forms
proteolytic (ˌprəʊtɪəˈlɪtɪk) adjective
Word Origin
C19: from New Latin, from proteo- (from protein) + -lysis
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
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proteolysis in Medicine

proteolysis pro·te·ol·y·sis (prō'tē-ŏl'ĭ-sĭs)
The hydrolytic breakdown of proteins into simpler, soluble substances, as occurs in digestion.

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