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potash

[pot-ash] /ˈpɒtˌæʃ/
noun
1.
potassium carbonate, especially the crude impure form obtained from wood ashes.
2.
potassium hydroxide.
3.
the oxide of potassium, K 2 O.
4.
potassium, as carbonate of potash.
Origin of potash
early Dutch
1615-1625
1615-25; back formation from plural pot-ashes, translation of early Dutch potasschen. See pot1, ash1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for potash

potash

/ˈpɒtˌæʃ/
noun
1.
another name for potassium carbonate, esp the form obtained by leaching wood ash
2.
another name for potassium hydroxide
3.
potassium chemically combined in certain compounds: chloride of potash
Word Origin
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
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Word Origin and History for potash
n.

1751, earlier -pot-ashes (1640s), a loan-translation of older Dutch potaschen, literally "pot ashes" (16c.); so called because it was originally obtained by soaking wood ashes in water and evaporating the mixture in an iron pot. Cf. German Pottasche, Danish potaske, Swedish pottaska, all also from Dutch. See also potassium. French potasse (1570s), Italian potassa are Germanic loan-words. The original plural was pot-ashes.

Online Etymology Dictionary, © 2010 Douglas Harper
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potash in Medicine

potash pot·ash (pŏt'āsh')
n.

  1. Any of several compounds containing potassium, especially soluble compounds such as potassium oxide and various potassium sulfates, used chiefly in fertilizers.

  2. See potassium carbonate.

  3. See potassium hydroxide.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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potash in Science
potash
  (pŏt'āsh')   
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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