Rochelle-salt meaning

rə-shĕl', rō-
A colorless crystalline compound, potassium sodium tartrate, KNaC4H4O64H2O, used as a laxative, in baking powders, and, in electronics, as a piezoelectric material.
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(inorganic chemistry) The double salt potassium sodium tartrate that is used as a cathartic.
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Origin of rochelle-salt

  • After (La) Rochelle
    From American Heritage Dictionary of the English Language, 5th Edition
  • From La Rochelle in France
    From Wiktionary