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

Origin of phototherapy

First recorded in 1895–1900; photo- + therapy
Related formspho·to·the·rap·ic [foh-toh-thuh-rap-ik] /ˌfoʊ toʊ θəˈræp ɪk/, adjectivepho·to·ther·a·pist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for phototherapy

Historical Examples

  • Hence there has arisen in medicine a vast and most interesting chapter of phototherapy.

    Pedagogical Anthropology

    Maria Montessori

British Dictionary definitions for phototherapy


phototherapeutics (ˌfəʊtəʊˌθɛrəˈpjuːtɪks)

  1. (functioning as singular) the use of light in the treatment of disease
Derived Formsphototherapeutic, adjectivephototherapeutically, adverb
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

phototherapy in Medicine


([object Object])
  1. The treatment of a disorder, especially of the skin, by exposure to light, including ultraviolet and infrared radiation.light treatment
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

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