n. An enzyme found in the liver that catalyses the decomposition of hydrogen peroxide to water and oxygen.
the GNU version of the Collaborative International Dictionary of English
n. an enzyme found in most plant and animal cells that functions as an oxidative catalyst; it decomposes hydrogen peroxide into hydrogen and water.
The Century Dictionary and Cyclopedia
n. An oxidation-ferment which decomposes hydrogen peroxid catalytically with the liberation of oxygen.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water
Word Usage
"One reason for their discontent may be found in the results of another recent study, which named an enzyme called catalase as a primary culprit for causing graying hair."