Columbium

4 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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 [gcide]:

  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 WordNet (r) 2.0 [wn]:

  columbium
       n : a former name for niobium

From Elements database 20001107 [elements]:

  columbium
  The original name for {niobium}.