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 columbate is as below...

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..

Columbate :: Columbate (n.) A salt of columbic acid; a niobate. See Columbium.

Niobate :: Niobate (n.) Same as Columbate.

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