photoreactivation
noun
pho·to·re·ac·ti·va·tion ˌfō-tō-rē-ˌak-tə-ˈvā-shən 
: repair of DNA (as of a bacterium) especially by a light-dependent enzymatic reaction after damage by ultraviolet irradiation
photoreactivating
ˌfō-tō-rē-ˈak-tə-ˌvā-tiŋ
adjective 
Word History
First Known Use
1949, in the meaning defined above
Medical Definition
photoreactivation
noun
pho·to·re·ac·ti·va·tion -rē-ˌak-tə-ˈvā-shən
: repair of DNA (as of a bacterium) especially by a light-dependent enzymatic reaction after damage by ultraviolet irradiation