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montmorillonite Syllabification: mont·mo·ril·lon·ite
Pronunciation: /ˌmäntməˈrilənīt/

Definition of montmorillonite in English:


An aluminum-rich clay mineral of the smectite group, containing some sodium and magnesium.
Example sentences
  • To test their theory, the researchers added small particles of montmorillonite - a clay widespread in the environment.
  • The three investigators found that a porous clay called montmorillonite, already known to encourage the linking of nucleic acids, also has an effect on fatty acids, the building blocks of cell membranes.
  • Ancient deposits of weathered volcanic ash containing the special healing mud known as montmorillonite have been found on a farm 15 km east of Northampton.


Mid 19th century: from Montmorillon, the name of a town in France, + -ite1.

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(especially as a direction) very loud or loudly