The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; -- hence called also caustic potash.
The impure potassium carbonate obtained by leaching wood ashes, either as a strong solution (lye), or as a white crystalline (pearlash).
usually made from wood ashes. One of the three main minerals in fertilizer. A term used to denote potassium. Quiet Woods Winston, David Buy this Art Print at AllPosters.com