photosensitivity(redirected from photosensitivities)
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Related to photosensitivities: photosensitivity dermatitis
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.
pho•to•sen•si•tiv•i•ty(ˌfoʊ təˌsɛn sɪˈtɪv ɪ ti)
1. the quality of being photosensitive.
2. abnormal sensitivity of the skin to ultraviolet light, usu. following exposure to certain drugs or chemicals.