Columbium

Definition:

• (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.

Compare columbium with other words:

columbiferous vs. columbium

columbite vs. columbium

columbium vs. pegmatite

columbium vs. niobium