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1. (n.) columbite
a black mineral, mainly iron niobate, (Fe, Mn)Nb
Etymology: (1801; Columb(ia) (def. 5) + -ium2)
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| Definition of 'columbite' |
Princeton's WordNet |
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1. (noun) niobite, columbite
a black mineral that is an ore of niobium and tantalum
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| Definition of 'columbite' |
Webster Dictionary |
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1. (noun) columbite
a mineral of a black color, submetallic luster, and high specific specific gravity. It is a niobate (or columbate) of iron and manganese, containing tantalate of iron; -- first found in New England
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Definitions of columbite 
