pot·ash (p t  sh )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. |
potash, potassa
chemically speaking, potassium hydrate, a strong caustic. In farming terms, potassium carbonate as it is mixed into fertilizers to redress a deficiency of potassium in the soil.
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