D defs.my
Entry 1 sense Webster, 1913

Saponite

· Sap·o·nite · IPA
01 n. A hydrous silicate of magnesia and alumina. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock.
  1. 1.
    A hydrous silicate of magnesia and alumina. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock.(Min.)