pitchblende Meaning, Definition & Usage

  1. 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
    uraninite.

WordNet

Pitch"blende` noun
Etymology
1st pitch + blende.
Definitions
  1. (Min.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

Webster 1913