Hypertext Webster Gateway: "Columbium"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Columbium \Co*lum"bi*um\, n. [NL., fr. Columbia America.]
(Chem.)
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}.
From WordNet (r) 1.7 (wn)
columbium
n : a former name for niobium
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