Bible Dictionaries
Columbium
Webster's Dictionary
(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.
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Bibliography Information
Webster, Noah. Entry for 'Columbium'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/c/columbium.html. 1828.