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Rochelle salt

noun

Chemistry, Pharmacology.
  1. a colorless or white, water-soluble solid, KNaC 4 H 4 O 6 ⋅4 2 O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative.


Rochelle salt

noun

  1. a white crystalline double salt, sodium potassium tartrate, used in Seidlitz powder. Formula: KNaC 4 H 4 O 6 .4H 2 O
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of Rochelle salt1

First recorded in 1745–55; after La Rochelle
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Word History and Origins

Origin of Rochelle salt1

C18: named after La Rochelle , French port
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Example Sentences

Examples have not been reviewed.

In using the baking powder prepared according to my formula, you have in your bread Glauber instead of Rochelle salts.

From

This acid, united to the mineral alkali, makes Rochelle salt.

From

Rochelle salts and seltzer aperient are given dissolved in water; the ordinary dose is from one to four teaspoonfuls.

From

Itching often disappears after a good saline cathartic has acted—Rochelle salts, solution of magnesia citrate, or phosphate of soda.

From

In another vessel dissolve pure Rochelle salt to the amount of 2.6 w, and make up the solution to the volume v.

From

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Rochelle powdersroche moutonnée