| a white, crystalline, water-soluble solid, Na2SO4, used chiefly in the manufacture of dyes, soaps, detergents, glass, and ceramic glazes. |

| sodium sulfate n. A white crystalline compound, Na2SO4, used to manufacture paper, glass, dyes, and pharmaceuticals. |
sodium sulfate n.
A white crystalline compound used as a mild natural laxative and in larger doses as a hydragogue cathartic.