Pŏl'y-chrēst, n.

n. [Gr. πολύχρηστος, useful for many purposes, from πολύς, many, and χρηστός, useful, from χρῆσθαι, to use; Fr. polychreste, polycreste.] (Med.) A medicine that serves for many uses, or that cures many diseases. [Obs.]

Polychrest salt (O. Chem.), the sulphate of potassa.