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noun
A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium.
synonyms: atomic number 41, Nb.
is a specific kind of: metal, metallic element.
is a broader term that covers: columbium.
is contained in: columbite, niobite.
Dutch: niobiumPolish: niob, Nb
Find more on niobium elsewhere: etymology - rhymes - Wikipedia.
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