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See potassium nitrate.
[Middle English nitre, sodium carbonate, natron, from Old French, from Latin nitrum, from Greek nitron, from Egyptian nṯr.]
(Elements & Compounds) the usual US spelling of nitre
a crystalline compound, KNO3, produced by nitrification in soil, and used in gunpowders, fertilizers, and preservatives; saltpeter; niter.
A naturally occurring mineral form of potassium nitrate, used to make gunpowder.
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|Noun||1.||niter - (KNO3) used especially as a fertilizer and explosive|
fertiliser, fertilizer, plant food - any substance such as manure or a mixture of nitrates used to make soil more fertile
nitrate - any compound containing the nitrate group (such as a salt or ester of nitric acid)