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[hahy-drol-uh-sis] /haɪˈdrɒl ə sɪs/
noun, plural hydrolyses
[hahy-drol-uh-seez] /haɪˈdrɒl əˌsiz/ (Show IPA)
chemical decomposition in which a compound is split into other compounds by reacting with water.
Origin of hydrolysis
First recorded in 1875-80; hydro-1 + -lysis


[hahy-druh-lahyz] /ˈhaɪ drəˌlaɪz/
verb (used with or without object), hydrolyzed, hydrolyzing.
to subject or be subjected to hydrolysis.
Also, especially British, hydrolyse.
First recorded in 1875-80; hydro(lysis) + -lyze
Related forms
hydrolyzable, adjective
hydrolyzation, noun
hydrolyzer, noun
unhydrolyzed, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for hydrolyses


a chemical reaction in which a compound reacts with water to produce other compounds
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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Word Origin and History for hydrolyses



"chemical decomposition by water," 1880, formed in English from hydro- + Greek lysis "a loosening, a dissolution," from lyein "to loosen, dissolve" (see lose).

Online Etymology Dictionary, © 2010 Douglas Harper
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hydrolyses in Medicine

hydrolysis hy·drol·y·sis (hī-drŏl'ĭ-sĭs)
Decomposition of a chemical compound by reaction with water, such as the dissociation of a dissolved salt or the catalytic conversion of starch to glucose.

hy'dro·lyt'ic (-drə-lĭt'ĭk) adj.
hy'dro·lyze' (-drə-līz) v.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hydrolyses in Science
The breaking down of a chemical compound into two or more simpler compounds by reacting with water. The proteins, fats, and complex carbohydrates in food are broken down in the body by hydrolysis that is catalyzed by enzymes in the digestive tract.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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