Therapeutic or Preventive Procedure
phototherapy Audio
pho·to·ther·a·py [ foh-tuh-ther-uh-pee ]
Subclass of:
Therapeutic procedure
Definitions related to phototherapy:
  • The treatment of a disorder by exposure to light, including ultraviolet and infrared radiation. (Bartleby.com)
    NCI
    U.S. National Cancer Institute, 2021
  • The treatment of disease with certain types of light. Phototherapy can use lasers, LED, fluorescent lamps, and ultraviolet or infrared radiation.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • Treatment of a disease by exposure to light, especially by variously concentrated light rays or specific wavelengths.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • Treatment of disease by exposure to light, especially by variously concentrated light rays or specific wavelengths.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Light therapy is a way to treat seasonal affective disorder (SAD) and certain other conditions by exposure to artificial light. SAD is a type of depression that occurs at a certain time each year, usually in the fall or winter.
    Mayo Clinic
    Mayo Foundation for Medical Education and Research, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.