Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.


 (kăt′l-ās′, -āz′)
An enzyme found in living cells that catalyzes the decomposition of hydrogen peroxide, a potentially harmful oxidizing agent, into water and oxygen.

cat′a·lat′ic (kăt′l-ăt′ĭk) 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.


(Biochemistry) an enzyme that catalyses the decomposition of hydrogen peroxide
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈkæt lˌeɪs, -ˌeɪz)

an enzyme that decomposes hydrogen peroxide into oxygen and water.
[1900–05; catal (ysis) + -ase]
cat`a•lat′ic (-ˈæt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.catalase - enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water
enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
catalase, superoxide dismutase, glutathione peroxidase and reductase are protein in nature and important in protection against ROS (Norberg and Arner, 2001).
neuii is catalase and CAMP positive and coryneform-shaped basil.
Characterization and usefulness of stool antigen tests using a monoclonal antibody to Helicobacter pylori catalase. J Gastroenterol Hepatol 2012;27 Suppl 3:23-8.
Catalase negative, Indole negative, Oxidase negative
KEYWORDS: Antioxidant enzyme, Catalase, Polymorphism, Promoter, Reactive oxygen species.
Catalase activity: The isolate possess catalase, when a small amount of fungal isolate is added to hydrogen peroxide, bubbles of oxygen are observed according to the method of Tadayuki et al.
Caption: Activity of catalase on 3rd day and 5th day in vase and at senescence
The catalase activity and glutathione reductase levels were measured in erythrocytes.
Salt-tolerant callus indicated high activity of catalase that determined more protection against production of reactive oxygen species.
Superoxide radical inhibits catalase. Journal of Biological Chemistry 257, 5751-5754.