Rochelle salt

Ro·​chelle salt | \ rō-ˈshel- How to pronounce Rochelle salt (audio) \

Definition of Rochelle salt

 (Entry 1 of 4)

: a crystalline salt KNaC4H4O6·4H2O that is a mild purgative

La Rochelle

geographical name (1)
La Ro·​chelle | \ ˌlä-rō-ˈshel How to pronounce La Rochelle (audio) \

Definition of La Rochelle (Entry 2 of 4)

city and port on the Bay of Biscay in western France population 75,170

New Rochelle

geographical name (2)
New Ro·​chelle | \ rə-ˈshel How to pronounce New Rochelle (audio) \

Definition of New Rochelle (Entry 3 of 4)

city in southeastern New York on Long Island Sound east of Mount Vernon population 77,062

Rochelle powders

plural noun
Ro·​chelle powders | \ (ˈ)rō¦shel- \

Definition of Rochelle powders (Entry 4 of 4)

: seidlitz powders

First Known Use of Rochelle salt


1712, in the meaning defined above

History and Etymology for Rochelle salt


La Rochelle, France

Plural noun

from La Rochelle, city in western France

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Time Traveler for Rochelle salt

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The first known use of Rochelle salt was in 1712

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Cite this Entry

“Rochelle salt.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2020.

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More Definitions for Rochelle salt

Rochelle salt

Ro·​chelle salt | \ rō-ˈshel- How to pronounce Rochelle salt (audio) \

Medical Definition of Rochelle salt

: a crystalline salt C4H4KNaO6·4H2O that is a mild purgative

called also potassium sodium tartrate, Seignette salt, sodium potassium tartrate

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