xenon Syllabification: (xe·non)Pronunciation: /ˈzēˌnän, ˈzenˌän/Definition of xenon noun the chemical element of atomic number 54, a member of the noble gas series. It is obtained by distillation of liquid air and is used in some specialized electric lamps. (Symbol: Xe)Origin: late 19th century: from Greek, neuter of xenos 'strange'xenon in other Oxford dictionaries Definition of xenon in the British & World English dictionary
