Definition of "potassa" [po•tas•sa]

• A trivial name for chemical compound potassium hydroxide. (noun)

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• "Here is a salt called chlorate of potassa, which is now made in large quantities for bleaching, and chemical and medical uses, and for pyrotechnic and other purposes."
• "-- Bad or foul breath will be removed by taking a teaspoonful of the following mixture after each meal: One ounce chloride of soda, one ounce liquor of potassa, one and one-half ounces phosphate of soda, and three ounces of water."
• "_Yellow -- Rich: _ -- Work five pounds of goods one-half hour in a boiling bath with three ounces bichromate of potassa and two ounces alum; lift and expose till well cooled and drained; then work one-half hour in another bath with five pounds of fustic."