photosensitive Syllabification: (pho·to·sen·si·tive)Pronunciation: /ˌfōtəˈsensitiv/Definition of photosensitive adjective having a chemical, electrical, or other response to light:photosensitive cells photosensitive drugsDerivatives photosensitivityPronunciation: /-ˌsensəˈtivitē/ noun photosensitive in other Oxford dictionaries Definition of photosensitive in the British & World English dictionary