pho·to·sen·si·tiv·i·ty (f  t-s ns -tv -t )n. pl. pho·to·sen·si·tiv·i·ties 1. Sensitivity or responsiveness to light. 2. Medicine An abnormally heightened response, especially of the skin, to sunlight or ultraviolet radiation, caused by certain disorders or chemicals and characterized by a toxic or allergic reaction. |
| photosensitivity (ft-sns-tv-t) 1. Sensitivity or responsiveness to light. 2. An abnormally heightened response, especially of the skin or eyes, to sunlight or ultraviolet radiation, caused by certain disorders, medications, or chemicals. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | photosensitivity - sensitivity to the action of radiant energy sensitivity, sensitiveness, sensibility - (physiology) responsiveness to external stimuli; the faculty of sensation; "sensitivity to pain" |
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