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Noun manganese has 1 sense
  1. manganese, Mn, atomic number 25 - a hard brittle gray polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
    --1 is a kind of metallic element, metal
    --1 is a substance of
     hausmannite; manganite; psilomelane; pyrolusite; rhodochrosite
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