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saponite

[sap-uh-nahyt] /ˈsæp əˌnaɪt/
noun
1.
a clay mineral, hydrous magnesium aluminum silicate, belonging to the montmorillonite group: found as a soft filling in rock cavities.
Origin
1840-1850
1840-50; < Swedish saponit < Latin sāpōn- (stem of sāpō) soap + Swedish -it -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for saponites

saponite

/ˈsæpəˌnaɪt/
noun
1.
a clay mineral consisting of hydrated magnesium aluminium silicate and occurring in metamorphic rocks such as serpentine
Word Origin
C19: from Swedish saponit (a rendering of German Seifenstein soapstone), from Latin sāpōsoap
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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11
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