peroxidase

noun

per·​ox·​i·​dase pə-ˈräk-sə-ˌdās 

-ˌdāz

: an enzyme that catalyzes the oxidation of various substances by peroxides

Examples of peroxidase in a Sentence

Recent Examples on the Web

The microneedle surface is coated with a thin layer of gold, mixed with a bio-hydrogel composed of biocompatible and hydrophilic chitosan and horseradish peroxidase enzymes. —Mack Degeurin, Popular Science, 19 Mar. 2025

Antioxidant enzymes like glutathione peroxidase in selenium help protect liver cells from damage by reducing unstable oxygen molecules. —Devineé Lingo, M.s., Rdn, Health, 9 Sep. 2024

The black garlic treatment increased blood levels of the antioxidant enzymes glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD), suggesting that black garlic helps boost the body's antioxidant defenses, which may improve the health and functioning of the heart. —Jillian Kubala, Rd, Health, 2 July 2024

The horseradish peroxidase reaction’s byproduct then turns the solution red. —IEEE Spectrum, 5 June 2014

Erythrocyte reduced glutathione levels, erythrocyte glutathione peroxidase and superoxide dismutase activities were significantly increased in the rats kept in the pyramid as compared to the other two groups. —Ncbi Rofl, Discover Magazine, 22 Feb. 2012

Antibodies to thyroid peroxidase are found in about 20% of healthy women, up to 40% of people with Type 1 diabetes, and in 90% to 100% of people with autoimmune thyroiditis (Hashimoto’s thyroiditis). —Dr. Keith Roach, oregonlive, 10 June 2022

Word History

First Known Use

1900, in the meaning defined above

Rhymes for peroxidase

• atpase
• bioassays
• carboxylase
• cholinesterase
• coagulase
• collagenase
• communiques
• glucosidase
• hexokinase
• hydroxylase
• isomerase
• luciferase

Medical Definition

peroxidase

noun

per·​ox·​i·​dase pə-ˈräk-sə-ˌdās, -ˌdāz 

: an enzyme occurring especially in plants, milk, and white blood cells and consisting of a protein complex with hematin groups that catalyzes the oxidation of various substances by peroxides