montmorillonite

noun
mont·​mo·​ril·​lon·​ite | \ˌmänt-mə-ˈri-lə-ˌnīt, -ˈrē-ə-ˌnīt \

Definition of montmorillonite 

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

Other Words from montmorillonite

montmorillonitic \-​ˌri-​lə-​ˈni-​tik, -​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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