thorianite

noun

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

Etymology

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

thoria

thorianite

thoriate

See More Nearby Entries 

Cite this Entry

“Thorianite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thorianite. Accessed 16 Nov. 2024.

Copy Citation

Share

More from Merriam-Webster on thorianite

Britannica.com: Encyclopedia article about thorianite

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See All

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

Plural and Possessive Names: A Guide

The Difference Between 'i.e.' and 'e.g.'

Why is '-ed' sometimes pronounced at the end of a word?

What's the difference between 'fascism' and 'socialism'?
See All

Popular in Wordplay

See All

8 Words with Fascinating Histories

8 Words for Lesser-Known Musical Instruments

Birds Say the Darndest Things

10 Words from Taylor Swift Songs (Merriam's Version)

10 Scrabble Words Without Any Vowels
See All

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
silhouette of a man with a megaphone against a british flag
Another Great British Vocabulary Quiz, Innit? A double-decker quiz with words from across the pond