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uraninite

[ yoo-ran-uh-nahyt, -rey-nuh- ]

noun

  1. 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.


uraninite

/ jʊˈrænɪˌnaɪt /

noun

  1. 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
“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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Word History and Origins

Origin of uraninite1

First recorded in 1875–80; uran(ium) + -in 2 + -ite 1
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Word History and Origins

Origin of uraninite1

C19: see uranium , -in , -ite 1
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Example Sentences

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

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uranideuraniscus