D defs.my
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Entry 1 sense Webster, 1913

Pitchblende

/pĭch'-blĕndˌ/ · Pitch·blende · IPA /ˈpɪtʃblɛnd/
01 n. A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.
  1. 1.
    A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.(Min.) See: Uraninite