\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}.