Rochelle salt
noun Chemistry, Pharmacology.
a colorless or white, water-soluble solid, KNaC4H4O6⋅4H2O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative.
Origin of Rochelle salt
First recorded in 1745–55; after La Rochelle
Also called potassium sodium tartrate.
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British Dictionary definitions for potassium sodium tartrate
Rochelle salt
noun
a white crystalline double salt, sodium potassium tartrate, used in Seidlitz powder. Formula: KNaC 4 H 4 O 6 .4H 2 O
Word Origin for Rochelle salt
C18: named after La Rochelle, French port
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Medical definitions for potassium sodium tartrate
Rochelle salt
[ rə-shĕl′, rō- ]
n.
potassium sodium tartrate
The American Heritage® Stedman's Medical Dictionary
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