Pol"y*chrest (?), n. [Gr. useful for many purposes; many + useful, fr. to use: cf. F. polychreste.] Med.
A medicine that serves for many uses, or that cures many diseases.
[Obs.]
Polychrest salt Old Med. Chem., potassium sulphate, specifically obtained by fusing niter with sulphur.
© Webster 1913.