ox·​i·​dase ˈäk-sə-ˌdās How to pronounce oxidase (audio)
: any of various enzymes that catalyze oxidations
especially : one able to react directly with molecular oxygen
oxidasic adjective

Examples of oxidase in a Sentence

Recent Examples on the Web In people with active CGD, genetic mutations are thought to cause a defect in a key enzyme, NADPH oxidase. Isabella Cueto, STAT, 10 Oct. 2023 The reason this happens is because apples contain an enzyme called polyphenol oxidase. Lisa Cericola, Southern Living, 16 Aug. 2023 According to Smithsonian Magazine, bees have an enzyme in their stomachs called glucose oxidase, which mixes with nectar and breaks down into gluconic acid and hydrogen peroxide. USA TODAY, 28 June 2023 Bees must add an enzyme to the honey to help fight microbes further: glucose oxidase. Darren Incorvaia, Discover Magazine, 15 Aug. 2021 The specific sequence used was a fragment of the cytochrome c oxidase I (COI) mitochondrial gene that enables species to be identified without relying on any morphological indicators such as color or shape [4]. Ashton Yoon, Discover Magazine, 28 Mar. 2017 The acids in lemon juice will inactivate the polyphenol oxidase enzyme and prevent the browning process. Maryal Miller Carter, USA TODAY, 17 Apr. 2023 Test tube experiments have shown that light can trigger the enzyme cytochrome C oxidase, which is present on mitochondrial membranes, to rev up cellular energy production, which in turn might increase blood flow and stimulate cells to churn out several neuroprotective proteins and growth factors. Gunjan Sinha, Science | AAAS, 17 Sep. 2020 From this tissue, the lab sequences a section of a gene known as cytochrome c oxidase subunit 1, or CO1. Elizabeth Kolbert, The New Yorker, 13 Mar. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'oxidase.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary

First Known Use

1896, in the meaning defined above

Time Traveler
The first known use of oxidase was in 1896

Dictionary Entries Near oxidase

Cite this Entry

“Oxidase.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oxidase. Accessed 26 May. 2024.

Medical Definition


ox·​i·​dase ˈäk-sə-ˌdās, -ˌdāz How to pronounce oxidase (audio)
: any of various enzymes that catalyze oxidations
especially : one able to react directly with molecular oxygen

More from Merriam-Webster on oxidase

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