Meaning of uraninite

u•ran•i•nite

Pronunciation: (yoo-ran'u-nīt", -rā'nu-), [key]
— n.
  1. a mineral, probably originally uranium dioxide, UO, but altered by radioactive decay, and usually containing uranium trioxide, lead, radium, and helium, occurring in several varieties, including pitchblende: the most important ore of uranium.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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