photolysecommon nounSyllable DecompositionphotolyseEtymologyexpandfrom Ancient Greek φῶς dif=φῶς, φωτός (phôs, photos|light) and .Definition1. Cleavage of one or more bonds of a molecular entity resulting from light absorption, or any photochemical process in which such cleavage plays an essential role.expandPluralphotolysesTranslationsgerman:Photolyseenglish:photolysisspanish:fotólisis