[ pot-ash ]
/ ˈpɒtˌæʃ /


potassium carbonate, especially the crude impure form obtained from wood ashes.
potassium hydroxide.
the oxide of potassium, K2O.
potassium, as carbonate of potash.

Origin of potash

1615–25; back formation from plural pot-ashes, translation of early Dutch potasschen. See pot1, ash1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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British Dictionary definitions for potash

/ (ˈpɒtˌæʃ) /


another name for potassium carbonate, esp the form obtained by leaching wood ash
another name for potassium hydroxide
potassium chemically combined in certain compoundschloride of potash

Word Origin for potash

C17 pot ashes, translation of obsolete Dutch potaschen; so called because originally obtained by evaporating the lye of wood ashes in pots
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

Medical definitions for potash

[ pŏtăsh′ ]


Any of several compounds containing potassium, especially soluble compounds such as potassium oxide and various potassium sulfates, used chiefly in fertilizers.
potassium carbonate
potassium hydroxide
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for potash

[ pŏtăsh′ ]

Any of several chemical compounds that contain potassium, especially potassium carbonate (K2CO3), which is a strongly alkaline material obtained from wood ashes and used in fertilizers.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.