ALL meanings of uraninite
u·ran·i·nite
U u - noun uraninite a mineral, probably originally uranium dioxide, UO 2 , 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. 1
- noun uraninite (mineralogy) Any of several brownish-black forms of uranium dioxide, UO2, (especially pitchblende) that is the chief ore of uranium; it is isomorphous with thorianite. 0
- noun uraninite a blackish heavy radioactive mineral consisting of uranium oxide in cubic crystalline form together with radium, lead, helium, etc: occurs in coarse granite. Formula: UO2 0
- noun uraninite a hard, very heavy, dark-colored, radioactive mineral, UO2, the chief ore of uranium; uranium oxide 0