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BNC: 0 COCA: 39644
niobium
noun [U] chemistry /naɪˈəʊbiəm/
  1. a chemical element that is a silvery-grey metal. Its symbol is Nb.
     Synonyms and related words
    Chemical elements:actinium, alkali metal, americium...
BNC: 0 COCA: 39644
BNC: 0 COCA: 39644

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