- potassium carbonate (esp. when obtained from wood ashes)
- potassium hydroxide
- 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 KO: used in fertilizers, soaps, etc.
Origin: earlier in pl., potashes < Du potasschen < pot, pot + asch, ash: orig. prepared by evaporating the lixivium of wood ashes in iron pots
Used by arrangement with John Wiley & Sons, Inc.
- See potassium carbonate.
- See potassium hydroxide.
- Any of several compounds containing potassium, especially soluble compounds such as potassium oxide, potassium chloride, and various potassium sulfates, used chiefly in fertilizers.
Origin: Sing. of obsolete pot ashes, translation of obsolete Dutch potaschen (from the fact that this substance was originally obtained by leaching wood ashes and evaporating the leach in a pot).
potash - Medical Definition
potash - Science Definition
Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.