phototherapy

noun

pho·​to·​ther·​a·​py ˌfō-tō-ˈther-ə-pē How to pronounce phototherapy (audio)

Examples of phototherapy in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In our cover story for this issue, Jacobsen explores new phototherapies for autoimmune conditions such as multiple sclerosis. Allison Parshall, Scientific American, 20 May 2025 Those treatments can range from prescription topical creams, which are often steroids, to oral medications, injectables, and even phototherapy. Lynya Floyd, Allure, 23 May 2025 Spray-on tans and phototherapy services (those used for medical reasons) are exempt from the tax. Kelly Phillips Erb, Forbes.com, 23 May 2025 In our cover story, journalist Rowan Jacobsen introduces us to Kathy Reagan Young, who was diagnosed with multiple sclerosis (MS) in 2008 and took up phototherapy relatively recently. Jeanna Bryner, Scientific American, 20 May 2025 See All Example Sentences for phototherapy

Word History

First Known Use

1899, in the meaning defined above

Time Traveler
The first known use of phototherapy was in 1899

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Cite this Entry

“Phototherapy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phototherapy. Accessed 8 Jun. 2025.

Medical Definition

phototherapy

noun
pho·​to·​ther·​a·​py -ˈther-ə-pē How to pronounce phototherapy (audio)
plural phototherapies
: the application of light for therapeutic purposes

More from Merriam-Webster on phototherapy

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