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phototherapy

American  
[foh-tuh-ther-uh-pee] / ˌfoʊ təˈθɛr ə pi /

noun

  1. treatment of disease, especially of the skin, by means of light rays.

  2. light therapy.

phototherapy British  
/ ˌfəʊtəʊˈθɛrəpɪ, ˌfəʊtəʊˌθɛrəˈpjuːtɪks /

noun

  1. (functioning as singular) the use of light in the treatment of disease

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of phototherapy

First recorded in 1895–1900; photo- + therapy

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Phototherapy, which uses ultraviolet light to tame inflammation, is an option, too.

From Washington Post • Dec. 30, 2016

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.