wol·​las·​ton·​ite ˈwu̇-lə-stə-ˌnīt How to pronounce wollastonite (audio) ˈwä- How to pronounce wollastonite (audio)
: a triclinic mineral consisting of a native calcium silicate occurring usually in cleavable masses

Example Sentences

Recent Examples on the Web Calcium silicate is found in other forms, including wollastonite in the crust and breyite in the middle and lower regions of the mantle. Stephanie Pappas, Scientific American, 11 Nov. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'wollastonite.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


William H. Wollaston

First Known Use

1823, in the meaning defined above

Time Traveler
The first known use of wollastonite was in 1823

Dictionary Entries Near wollastonite

Cite this Entry

“Wollastonite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wollastonite. Accessed 3 Feb. 2023.

More from Merriam-Webster on wollastonite

Love words? Need even more definitions?

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

Fashionable Words

  • dog-sunglasses-scarf
  • Which of these items is named for a deadly weapon?
Spell It

Hear a word and type it out. How many can you get right?

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?