salt cake

noun

Chemistry.

1. an impure form of sodium sulfate, especially as obtained by the interaction of sulfuric acid and common salt in the synthesis of hydrochloric acid: used chiefly in the manufacture of glass, ceramic glazes, soaps, and sodium salts.

salt cake

noun

1. an impure form of sodium sulphate obtained as a by-product in several industrial processes: used in the manufacture of detergents, glass, and ceramic glazes

Word History and Origins

Origin of salt cake¹

First recorded in 1695–1705