Rochelle salt
noun
Ro·chelle salt rō-ˈshel- 
: a crystalline salt KNaC4H4O6·4H2O that is a mild purgative
Word History
Etymology
La Rochelle, France
First Known Use
1712, in the meaning defined above
Medical Definition
Rochelle salt
noun
Ro·chelle salt rō-ˈshel-
: a crystalline salt C4H4KNaO6·4H2O that is a mild purgative
called also potassium sodium tartrate, Seignette salt, sodium potassium tartrate
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