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Webster 1913 Edition

Saponite

Sap′o-nite

,
Noun.
[Sw.
saponit
, fr. L.
sapo
,
-onis
, soap.]
(Min.)
A hydrous silicate of magnesia and alumina. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock.

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