[kat-l-eys, -eyz]

noun Biochemistry.

an enzyme that decomposes hydrogen peroxide into oxygen and water.

Origin of catalase

First recorded in 1900–05; catal(ysis) + -ase
Related formscat·a·lat·ic [kat-l-at-ik] /ˌkæt lˈæt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for catalase

Historical Examples of catalase

British Dictionary definitions for catalase



an enzyme that catalyses the decomposition of hydrogen peroxide
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

catalase in Medicine


[kătl-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.