photosensitization

photosensitization
\\“+\ noun
Etymology: phot- + sensitization
1. : the process of photosensitizing
2. : the condition of a cell, tissue, or organism acted upon by a substance (as a dyestuff) that renders it sensitive to a particular region of the spectrum to which it was previously insensitive
3. : the development in light-colored skin of an abnormal capacity to react to sunlight typically by edematous swelling and dermatitis that in grazing animals results from ingestion of toxic substances (as porphyrins) that cause the body to absorb ultraviolet rays to an excessive degree where these are not screened out by skin pigments — compare bighead, fagopyrism, hypericism
4. : a chemical change through the agency of a substance excited by the absorption of radiant energy (as light)

Useful english dictionary. 2012.

Look at other dictionaries:

  • photosensitization — (Amer.) n. process of photosensitizing; (Dermatology) state of being photosensitized, sensitization of the skin to sunlight; (Medicine) development of irregularly high reactiveness of the eyes to sunlight (also photosensitisation) …   English contemporary dictionary

  • photosensitization — pho·to·sen·si·ti·za·tion (fō tō sĕn sĭ tĭ zāʹshən) n. The act or process of inducing photosensitivity. * * * ▪ chemistry       the process of initiating a reaction through the use of a substance capable of absorbing light and transferring the… …   Universalium

  • photosensitization — fotosensibilizavimas statusas T sritis chemija apibrėžtis Jautrumo šviesai didinimas. atitikmenys: angl. photosensitization rus. фотосенсибилизация …   Chemijos terminų aiškinamasis žodynas

  • photosensitization — noun Date: circa 1923 1. the process of photosensitizing 2. the condition of being photosensitized; especially the development of an abnormal capacity to react to sunlight typically by edematous swelling and dermatitis …   New Collegiate Dictionary

  • photosensitization — noun a) The acquisition of photosensitivity b) The transfer of a photon from one excited state to another, which then undergoes a reaction …   Wiktionary

  • photosensitization — 1. Sensitization of the skin to light, usually due to the action of certain drugs, plants, or other substances; may occur shortly after administration of the drug (phototoxic sensitivity), or may occur only after a latent period of from days to… …   Medical dictionary

  • photosensitization — pho·to·sensitization …   English syllables

  • hepatogenous photosensitization — photosensitization caused by accumulation in body tissues of a photosensitizing substance, usually because of inadequate clearance through the liver; it often occurs in ruminants when plants break down in the stomach under anaerobic conditions… …   Medical dictionary

  • photosensitize — photosensitization, n. /foh teuh sen si tuyz /, v.t., photosensitized, photosensitizing. to make (a material) photosensitive, as by the application of a photosensitive emulsion. Also, esp. Brit., photosensitise. [1920 25; PHOTOSENSIT(IVE) + IZE]… …   Universalium

  • blue nose disease — photosensitization of the face of a horse following ingestion of any of certain meadow plants; characteristics include blue discoloration of the muzzle, sloughing of nonpigmented skin, and frequently intense excitement …   Medical dictionary

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