excimer Syllabification: (ex·ci·mer)Pronunciation: /ˈeksəmər/Definition of excimer noun Chemistry an unstable molecule that is formed in an excited state by the combination of two smaller molecules or atoms and rapidly dissociates with emission of radiation. Such species are utilized in some kinds of lasers. Origin: 1960s: blend of excited and dimerexcimer in other Oxford dictionaries Definition of excimer in the British & World English dictionary
