1 thorianite | Definition of thorianite

thorianite

noun
tho·​ri·​a·​nite | \ ˈthȯr-Ä“-É™-ËŒnÄ«t How to pronounce thorianite (audio) \

Definition of thorianite

: a strongly radioactive mineral that is an oxide of thorium and often contains rare earth elements

First Known Use of thorianite

1904, in the meaning defined above

History and Etymology for thorianite

irregular from thoria

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More from Merriam-Webster on thorianite

Britannica.com: Encyclopedia article about thorianite