uraninite

noun

ura·​ni·​nite yu̇-ˈrā-nə-ˌnīt 

: a black octahedral mineral that consists of an oxide of uranium which usually contains thorium, lead, and rare earth elements and is the chief ore of uranium

Word History

Etymology

German Uranin uraninite (from New Latin uranium) + English -ite

First Known Use

1879, in the meaning defined above

Kids Definition

uraninite

noun

ura·​ni·​nite yu̇-ˈrā-nə-ˌnīt 

: a mineral that is a black oxide of uranium, contains also various metals (as thorium and lead), and is the chief ore of uranium

Medical Definition

uraninite

noun

ura·​ni·​nite yu̇-ˈrā-nə-ˌnīt 

: a mineral that is basically a black octahedral or cubic oxide of uranium containing lead, thorium, and rare earth elements and that is the chief ore of uranium