Rochelle salt Meaning, Definition & Usage

  1. noun a double salt used in Seidlitz powder; acts as a cathartic
    potassium sodium tartrate; Rochelle salts.

WordNet

Definitions
  1. (Chem.), the double tartrate of sodium and potassium, a white crystalline substance. It has a cooling, saline, slightly bitter taste and is employed as a mild purgative. It was discovered by Seignette, an apothecary of Rochelle, and is called also Seignete's salt.
Definitions
  1. . See under Rochelle.

Webster 1913