Nb

Definitions of Nb
  1. noun
    a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
    synonyms: atomic number 41, niobium
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    types:
    columbium
    a former name for niobium
    type of:
    metal, metallic element
    any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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