Definitions for saltpetre
Princeton's WordNet
potassium nitrate, saltpeter, saltpetre, niter, nitre(noun)
(KNO3) used especially as a fertilizer and explosive
Wiktionary
saltpetre(Noun)
Potassium nitrate.
saltpetre(Noun)
Sodium nitrate.
Origin: From the Old French salpetre, from Late Latin sal petrae.
Webster Dictionary
Saltpetre(noun)
potassium nitrate; niter; a white crystalline substance, KNO3, having a cooling saline taste, obtained by leaching from certain soils in which it is produced by the process of nitrification (see Nitrification, 2). It is a strong oxidizer, is the chief constituent of gunpowder, and is also used as an antiseptic in curing meat, and in medicine as a diuretic, diaphoretic, and refrigerant
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