columbium

from WordNet (r) 3.0 (2006)

columbium
    n 1: a former name for niobium

from The Collaborative International Dictionary of English v.0.48

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}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

niobium \ni*o"bi*um\, n. [NL., fr. L. & E. {Niobe}.] (Chem.)
   The chemical element of atomic number 41. Chemical symbol Nb.
   Atomic weight 92.91. Previously called {columbium}. See also
   {Columbium}.
   [1913 Webster]

from The Elements (07Nov00)

columbium
The original name for {niobium}.

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