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1. (n.) niobium
a steel-gray metallic element resembling tantalum in its chemical properties; becomes a superconductor below 9 K; used chiefly in alloy steels.
Etymology: (1835–45; < NL; see Niobe , -ium2)
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Princeton's WordNet |
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1. (noun) niobium, Nb, atomic number 41
a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
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Webster Dictionary |
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1. (noun) niobium
a later name of columbium. See Columbium
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| Definition of 'niobium' |
U.S. National Library of Medicine |
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1. niobium
Niobium. A metal element atomic number 41, atomic weight 92.906, symbol Nb. (From Dorland, 28th ed)
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Definitions of niobium 
