xenon /ˈziːnɒn 
, ˈzɛnɒn / ▸ noun [mass noun] (Symbol: Xe) 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. – ORIGIN late 19th century: from Greek, neuter of xenos ‘strange’.
EnglishOxford Dictionary of English
