Definition of argon noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈɑːɡɒn//
; NAmE NAmE//ˈɑːrɡɑːn//
[uncountable] (symbol Ar)
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a chemical element. Argon is a gas that does not react with anything and is used in electric lights. Word Originlate 19th cent.: from Greek, neuter of argos ‘idle’, from a- ‘without’ + ergon ‘work’.
See the Oxford Advanced American Dictionary entry: argon