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English definition of “argon”

argon

noun [U]     /ˈɑː.ɡɒn/ US  /ˈɑːr.ɡɑːn/ (symbol Ar)
a chemical element that is a gas found in air. Argon does not react with other elements and is sometimes used to make electric lights.Chemical elements
(Definition of argon noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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