columbium

4 definitions found

columbium - 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]

  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]

columbium - WordNet (r) 2.1 (2005) :

  columbium
      n 1: a former name for niobium

columbium - Elements (07Nov00) :

  columbium
  The original name for niobium.