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[mass noun] An aluminium-rich clay mineral of the smectite group, containing some sodium and magnesium.
- ‘To test their theory, the researchers added small particles of montmorillonite - a clay widespread in the environment.’
- ‘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.’
- ‘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.’
Mid 19th century: from Montmorillon, the name of a town in France, + -ite.
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