montmorillonite

noun
mont·​mo·​ril·​lon·​ite | \ ˌmänt-mə-ˈri-lə-ˌnīt How to pronounce montmorillonite (audio) , -ˈrē-ə-ˌnīt How to pronounce montmorillonite (audio) \

Definition of montmorillonite

: a soft clayey water-absorbent mineral that is a hydrous aluminum silicate

Other Words from montmorillonite

montmorillonitic \ ˌmänt-​mə-​ˌri-​lə-​ˈni-​tik How to pronounce montmorillonite (audio) , -​ˌrē-​ə-​ˈni-​ \ adjective

First Known Use of montmorillonite

1854, in the meaning defined above

History and Etymology for montmorillonite

French, from Montmorillon, commune in western France

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The first known use of montmorillonite was in 1854

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Montmorency Falls

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Cite this Entry

“Montmorillonite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/montmorillonite. Accessed 18 Oct. 2021.

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More from Merriam-Webster on montmorillonite

Britannica.com: Encyclopedia article about montmorillonite

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