tho·​ri·​a·​nite ˈthȯr-ē-ə-ˌnīt How to pronounce thorianite (audio)
: a strongly radioactive mineral that is an oxide of thorium and often contains rare earth elements

Word History


irregular from thoria

First Known Use

1904, in the meaning defined above

Time Traveler
The first known use of thorianite was in 1904

Dictionary Entries Near thorianite

Cite this Entry

“Thorianite.” Dictionary, Merriam-Webster, Accessed 3 Feb. 2023.

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