potassium nitrate ( synonym found)
Definition of potassium nitrate:

(n) : the potassium salt of nitric acid, KNO3; used in the production of nitric acid, as a food preservative, and is used in toothpaste for sensitive gums
Definition of potassium nitrate:

(n) : the potassium salt of nitric acid, KNO3; used in the production of nitric acid, as a food preservative, and is used in toothpaste for sensitive gums
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