COLUMBIUM, noun A metal first discovered in an ore or oxyd, found in Connecticut, at New-London, near the house of Gov. Winthrop, and by him transmitted to Sir Hans Sloane, by whom it was deposited in the British museum. The same metal was afterwards discovered in Sweden, and called tantalum, and its ore tantalite.
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Webster's Dictionary 1828
American Dictionary of the English Language, Noah Webster, 1828.