radium

Noun
  1. An intensely radioactive metallic element that occurs in minute amounts in uranium ores (synset 114676100)
    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: uranium ore - any ore from which uranium can be extracted
    same as: atomic number 88, ra

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