Sap"o*nite (?), n. [Sw. saponit, fr. L. sapo, -onis, soap.] Min.
A hydrous silicate of magnesia and aluminia. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock.
© Webster 1913.
Log in or register to write something here or to contact authors.