Definition of uraninite in English:


Syllabification: u·ran·i·nite
Pronunciation: /yo͝oˈrānəˌnīt, -ˈranə-


A black, gray, or brown mineral that consists mainly of uranium dioxide and is the chief ore of uranium.pitchblende is a variety of uraninite.
More example sentences
  • Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.
  • Other accessory minerals are apatite, zircon, monazite, huttonite and rare xenotime, uraninite and betafite.
  • A comprehensive discussion of the mineralogy and occurrence of uraninite has been given by Frondel, to which the reader is strongly referred.


late 19th century: from urano-2 + -ite1.

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