/ Dictionary / Index P pitchblende: Meaning and Definition of Find definitions for: pitch•blende Pronunciation: (pich'blend"), [key] — n. Mineral. a massive variety of uraninite, occurring in black pitchlike masses: a major ore of uranium and radium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pitchblende (Thesaurus) pitch-black pitch chain Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language