Potash meaning

pŏtăsh
Any of several compounds containing potassium, especially soluble compounds such as potassium oxide, potassium chloride, and various potassium sulfates, used chiefly in fertilizers.
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Any substance containing potassium; esp., salts derived from natural brines, distillery waste, flue dusts of blast furnaces, etc., whose potassium content is expressed in terms of K2O: used in fertilizers, soaps, etc.
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Any of several chemical compounds that contain potassium, especially potassium carbonate (K2 CO3 ), which is a strongly alkaline material obtained from wood ashes and used in fertilizers.
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The water-soluble part of the ash formed by burning plant material; used for making soap, glass and as a fertilizer.
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(chemistry) An impure form of potassium carbonate (K2CO3) mixed with other potassium salts.
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(chemistry, archaic) In the names of compounds of the form "... of potash", potassium (for example, "permanganate of potash" = potassium permanganate)
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Origin of potash

  • From sing. of obsolete pot ashes an alkaline substance obtained by leaching wood ashes and evaporating the leachate in a pot

    From American Heritage Dictionary of the English Language, 5th Edition

  • Potash comes from the word potasch (in modern spelling potas), coined by the Dutch in 1598. The literal translation is pot ash, because it was made by burning wood to ashes in a large pot. The English word Potash dates back to 1648.

    From Wiktionary