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BNC: 39270 COCA: 25600
argon
noun [U] chemistry /ˈɑː(r)ɡɒn/
  1. a chemical element which is a gas that does not produce a chemical reaction when mixed with other substances. Its symbol is Ar and it is sometimes used in electric lights.
     Synonyms and related words
    Gases: acetylene, ammonia, argon...
BNC: 39270 COCA: 25600
BNC: 39270 COCA: 25600

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