potassium nit rate

potassium nitrate

noun Chemistry.
a crystalline compound, KNO 3 , produced by nitrification in soil, and used in gunpowders, fertilizers, and preservatives; saltpeter; niter.

Origin:
1880–85

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World English Dictionary
potassium nitrate
 
n
saltpetre, Also called: nitre a colourless or white crystalline compound used in gunpowders, pyrotechnics, fertilizers, and as a preservative for foods, esp as a curing salt for ham, sausages, etc (E252). Formula: KNO3

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American Heritage
Science Dictionary
potassium nitrate  
A transparent, white, crystalline compound and strong oxidizing agent. It is used in gunpowder and fireworks, in making glass, and in fertilizer. Also called saltpeter. Chemical formula: KNO3. See also niter.
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