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 months (photoallergic sensitivity, or photoallergy). 2. SYN: photodynamic sensitization.
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pho·to·sen·si·ti·za·tion also Brit pho·to·sen·si·ti·sa·tion -.sen(t)-sət-ə-'zā-shən, -.sen(t)-stə-'zā- n
1) the process of photosensitizing
2) the condition of being photosensitized esp the development of an abnormal capacity to react to sunlight typically by edematous swelling and dermatitis
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pho·to·sen·si·ti·za·tion (fo″to-sen″sĭ-tĭ-zaґshən) 1. the process of photosensitizing. 2. abnormally increased reactivity of the skin or eyes to sunlight.Medical dictionary. 2011.