atomic number 42

Noun
  1. A polyvalent metallic element that resembles chromium and tungsten in its properties;
    Used to strengthen and harden steel (synset 114669839)
    is a 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.
    substance meronym: molybdenite - a mineral resembling graphite that is valued as the chief source of molybdenum and its compounds
    same as: mo, molybdenum

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