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uraninite

[ yoo-ran-uh-nahyt, -rey-nuh- ]
/ yʊˈræn əˌnaɪt, -ˈreɪ nə- /
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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.

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Origin of uraninite

First recorded in 1875–80; uran(ium) + -in2 + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use uraninite in a sentence

  • There were two other mines that produced the same uraninite ore as the one at which Hanlon was stationed.

    Man of Many Minds|E. Everett Evans

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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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