uraninite

Từ điển Oxford Learners Wordfinder Dictionary

noun

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
• Syn:
pitchblende
• Hypernyms:
uranium ore
• Substance Meronyms:
uranium, U, atomic number 92