• A mineral consisting chiefly of uranium oxide with some lead,thorium, etc., occurring in black octahedrons, also in masses with apitchlike luster; pitchblende.


    Uraninite meaning & definition 1 of Uraninite.


  • Uraninite is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely uranium dioxide.

    Uraninite meaning & definition 2 of Uraninite.

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