Pitchblende

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pitchblende \Pitch"blende`\, n. [1st pitch + blende.] (Min.)
     A pitch-black mineral consisting chiefly of the oxide of
     uranium; uraninite. See {Uraninite}.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  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}]