uraninite
[ yoo-ran-uh-nahyt, -rey-nuh- ]
/ yʊˈræn əˌnaɪt, -ˈreɪ nə- /
noun
a mineral, probably originally uranium dioxide, UO2, 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.
Words nearby uraninite
urania,
uranian,
uranic,
uranic oxide,
uranide,
uraninite,
uraniscus,
uranism,
uranite,
uranite group,
uranium
British Dictionary definitions for uraninite
uraninite
/ (jʊˈrænɪˌnaɪt) /
noun
a blackish heavy radioactive mineral consisting of uranium oxide in cubic crystalline form together with radium, lead, helium, etc: occurs in coarse granite. Formula: UO 2
Word Origin for uraninite
C19: see
uranium,
-in,
-ite
1