pho·to·ox·i·da·tion
ˌfō-tō-ˌäk-sə-ˈdā-shən 
: oxidation under the influence of radiant energy (such as light)
: to undergo photooxidation
: to subject to photooxidation
Examples of photooxidation in a Sentence
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Katie Hunt, CNN, 9 Apr. 2022
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Noun
This is because when hops in beer are exposed to strong light, a photooxidation reaction takes place, creating the compound 3-methyl-2-butene-1-thiol.
—Katie Hunt, CNN, 9 Apr. 2022
Cite this Entry
“Photooxidation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photooxidation. Accessed 12 Jun. 2026.
Copy CitationMedical Definition
photooxidation
noun
pho·to·ox·i·da·tion
-ˌäk-sə-ˈdā-shən
: oxidation under the influence of radiant energy (as light)
photooxidize
verb
also British photooxidise
photooxidized also British photooxidised; photooxidizing also British photooxidising
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