Noun: uraninite yû'ra-nu,nIt
- A mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore
"Uraninite was a key source of radium for Marie Curie's research";
- pitchblende
Derived forms: uraninites
Type of: uranium ore
Encyclopedia: Uraninite