[sap.o.nite] n [Sw saponit, fr. L sapon-, sapo soap] (ca. 1849): a hydrous magnesium aluminum silicate occurring in soft soapy amorphous masses and filling veins and cavities (as in serpentine)
SAPONITE
Meaning of SAPONITE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012