Definition of Niobeum
Ni*o"bi*um (?), n. [NL., fr. L. & E.
Niobe.] (Chem.) A later name of columbium. See
Columbium.
- Webster's Unabridged Dictionary (1913)
- a metallic chemical element (symbol Nb) with an atomic number of 41.
- The Nuttall Encyclopedia
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The correct Spelling of this word is: Niobium
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