'Polyhalite' definitions:

Definition of 'Polyhalite'

From: GCIDE

Polyhalite \Pol`y*ha"lite\, n. [Poly- + Gr. ? 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] Polyhedral