Ro‐chelle″ (?), n. A seaport town in France.
Rochelle powders. Same as Seidlitz powders. — Rochelle salt(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.