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

treatment of disease, especially of the skin, by means of light rays.
(functioning as sing) the use of light in the treatment of disease

phototherapy pho·to·ther·a·py (fō’tō-thěr’ə-pē)
The treatment of a disorder, especially of the skin, by exposure to light, including ultraviolet and infrared radiation. Also called light treatment.


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  • Photothermic

    [foh-tuh-thur-mik] /ˌfoʊ təˈθɜr mɪk/ adjective 1. pertaining to the thermal effects of light. 2. pertaining to or involving both light and heat. /ˌfəʊtəʊˈθɜːmɪk/ adjective 1. of or concerned with light and heat, esp the production of heat by light

  • Phototonus

    [foh-tot-n-uh s] /foʊˈtɒt n əs/ noun, Biology. 1. the normal condition of sensitiveness to light in organisms or their organs. 2. the irritability exhibited by cytoplasm when exposed to light of a certain intensity. /fəʊˈtɒtənəs/ noun 1. the condition of plants that enables them to respond to the stimulus of light phototonus pho·tot·o·nus (fō-tŏt’n-əs) n. […]

  • Phototopography

    [foh-toh-tuh-pog-ruh-fee] /ˌfoʊ toʊ təˈpɒg rə fi/ noun 1. topographical surveying employing photogrammetric methods. /ˌfəʊtəʊtəˈpɒɡrəfɪ/ noun 1. the preparation of topographic maps from photographs

  • Phototoxic

    /ˌfəʊtəʊˈtɒksɪk/ adjective 1. (of cosmetics, skin creams, etc) making the skin hazardously sensitive to sunlight phototoxic pho·to·tox·ic (fō’tō-tŏk’sĭk) adj. Rendering the skin susceptible to damage by light. Used of certain medications. pho’to·tox·ic’i·ty (-tŏk-sĭs’ĭ-tē) n.

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