Found 2 items, similar to Niobium.
English → English (WordNet)
Definition: niobium
niobium
n : a soft gray ductile metallic element used in alloys; occurs
in niobite; formerly called columbium [syn:
Nb,
atomic number 41
]
English → English (gcide)
Definition: niobium
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
\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]