pho ‧ to ‧ sen ‧ si ‧ tize BrE AmE ( also photosensitise British English ) /ˌfəʊtəʊˈsensətaɪz, ˌfəʊtəʊˈsensɪtaɪz $ ˌfoʊtəˈsen-/ verb [transitive]
to make something photosensitive
pho ‧ to ‧ sen ‧ si ‧ tize BrE AmE ( also photosensitise British English ) /ˌfəʊtəʊˈsensətaɪz, ˌfəʊtəʊˈsensɪtaɪz $ ˌfoʊtəˈsen-/ verb [transitive]
to make something photosensitive
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012