n. [ Gr. "a`ls salt.] (Min.) Native salt; sodium chloride. [1913 Webster]
n. [ Poly- + Gr. &unr_; salt. ] (Min.) A mineral usually occurring in fibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda. [ 1913 Webster ]