Hypertext Webster Gateway: "pitchblende"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Pitchblende \Pitch"blende`\, n. [1st pitch + blende.] (Min.)
A pitch-black mineral consisting chiefly of the oxide of
uranium; uraninite. See {Uraninite}.
From WordNet (r) 1.7 (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}]
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