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Meaning of potassium nitrate

potas'sium ni'trate

Pronunciation: [key]
— Chem. Chem.
  1. a crystalline compound, KNO, produced by nitrification in soil, and used in gunpowders, fertilizers, and preservatives; saltpeter; niter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.