Definition of xenon noun from the Oxford Advanced American Dictionary

 

xenon

 noun
noun
NAmE//ˈzinɑn//
 
, NAmE//ˈzɛnɑn//
 
[uncountable](symbol Xe)
 
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a chemical element. Xenon is a gas that is found in very small quantities in the air and is used in some special electric lamps.
See the Oxford Advanced Learner's Dictionary entry: xenon