'catalase' definitions:

Definition of 'catalase'

From: WordNet
noun
Enzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water

Definition of 'catalase'

From: GCIDE
  • catalase \catalase\ n. an enzyme found in most plant and animal cells that functions as an oxidative catalyst; it decomposes hydrogen peroxide into hydrogen and water. [WordNet 1.5]