[kat-l-eys, -eyz]
noun Biochemistry.
an enzyme that decomposes hydrogen peroxide into oxygen and water.

1900–05; catal(ysis) + -ase

catalatic [kat-l-at-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
catalase (ˈkætəˌleɪs)
an enzyme that catalyses the decomposition of hydrogen peroxide

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

catalase cat·a·lase (kāt'l-ās', -āz')
An enzyme found in most living cells that catalyzes the decomposition of hydrogen peroxide to water and oxygen.

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


an enzyme that brings about (catalyzes) the reaction by which hydrogen peroxide is decomposed to water and oxygen. Found extensively in mammalian tissues, catalase prevents the accumulation of and protects the body tissues from damage by peroxide, which is continuously produced by numerous metabolic reactions.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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