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


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

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for phototherapy

  • 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)

/ (ˌfəʊtəʊˈθɛrəpɪ) /


(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

Medicine definitions for phototherapy


[ fō′tō-thĕrə-pē ]


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.