Definition of catalase in English:

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Pronunciation: /ˈkatlˌās/ Pronunciation: /-ˌāz/


An enzyme that catalyzes the reduction of hydrogen peroxide.
Example sentences
  • In addition, the human body produces its own antioxidants that take the form of enzymes, including catalase, glutathione peroxidase, and superoxide dismutase.
  • Many of these enzymes, such as catalase and glutathione peroxidase, are constitutively active and protect the lungs against everyday insults.
  • When the enzyme catalase is added to the hydrogen peroxide solution, the activation energy is lowered even further to 4 kJ / mol.


Early 20th century: from catalysis + -ase.

For editors and proofreaders

Syllabification: cat·a·lase

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