Found 2 items, similar to pitchblende.
English → English (WordNet) Definition: pitchblende pitchblende n : 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: uraninite]
English → English (gcide) Definition: Pitchblende Pitchblende \Pitch"blende`\, n. [1st pitch + blende.] (Min.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite. [1913 Webster]