Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of columbite is as below...

Columbium :: Columbium (n.) A rare element of the vanadium group, first found in a variety of the mineral columbite occurring in Connecticut, probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb. Now more commonly called niobium..

Yttro-columbite :: Yttro-columbite (n.) Alt. of Yttro-tantalit.

Niobite :: Niobite (n.) Same as Columbite.

Pelopium :: Pelopium (n.) A supposed new metal found in columbite, afterwards shown to be identical with columbium, or niobium..

Neptunium :: Neptunium (n.) A new metallic element, of doubtful genuineness and uncertain indentification, said to exist in certain minerals, as columbite..

Tarnish :: Tarnish (n.) A thin film on the surface of a metal, usually due to a slight alteration of the original color; as, the steel tarnish in columbite..

Columbite :: Columbite (n.) 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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