salt|pe|tre

salt|pe|tre
salt|pe|ter or salt|pe|tre «SLT PEE tuhr», noun.
1. a salty, white mineral, used in making gunpowder, in preserving meat, and in medicine; naturally occurring potassium nitrate; niter. Formula: KNO3
2. a naturally occurring form of sodium nitrate, used as a source of nitrogen in fertilizing soil; Chile saltpeter. Formula: NaNO3
3. = calcium nitrate. (Cf.calcium nitrate)
[< Old French salpetre, learned borrowing from Medieval Latin sal petrae salt of rock < Latin sāl, salis salt, petrae, genitive of petra rock < Greek pétrā]

Useful english dictionary. 2012.

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  • salt|pe|ter — or salt|pe|tre «SLT PEE tuhr», noun. 1. a salty, white mineral, used in making gunpowder, in preserving meat, and in medicine; naturally occurring potassium nitrate; niter. Formula: KNO3 2. a naturally occurring form of sodium nitrate, used as a… …   Useful english dictionary

  • salt — ba·salt; de·salt; per·salt; pseu·do·salt; salt; salt·ery; salt·fat; salt·i·ly; salt·i·ness; salt·ing; salt·ish; salt·less; salt·less·ness; salt·ly; salt·man; salt·ness; salt·pe·ter; salt·pe·trous; sul·fo·salt; su·per·salt; salt·er; salt·foot;… …   English syllables

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  • saltpetre — salt·pe·tre …   English syllables

  • saltpeter — salt•pe•ter or salt•pe•tre [[t]ˌsɔltˈpi tər[/t]] n. chem. naturally occurring potassium nitrate, used in making fireworks, gunpowder, etc.; niter • Etymology: 1275–1325; < ML salpetra, lit., salt of rock …   From formal English to slang

  • saltpetre — salt|pe|tre BrE saltpeter AmE [ˌso:ltˈpi:tə US ˌso:ltˈpi:tər] n [U] [Date: 1300 1400; : Old French; Origin: salpetre, from Medieval Latin sal petrae salt of the rocks ] a substance used in making ↑gunpowder (=powder that causes explosions) and… …   Dictionary of contemporary English

  • Chili salpeter — Saltpeter Salt pe ter, Saltpetre Salt pe tre,, n. [F. salp[^e]tre, NL. sal petrae, literally, rock salt, or stone salt; so called because it exudes from rocks or walls. See {Salt}, and {Petrify}.] (Chem.) Potassium nitrate; niter; a white… …   The Collaborative International Dictionary of English

  • cubic niter — Saltpeter Salt pe ter, Saltpetre Salt pe tre,, n. [F. salp[^e]tre, NL. sal petrae, literally, rock salt, or stone salt; so called because it exudes from rocks or walls. See {Salt}, and {Petrify}.] (Chem.) Potassium nitrate; niter; a white… …   The Collaborative International Dictionary of English

  • KNO3 — Saltpeter Salt pe ter, Saltpetre Salt pe tre,, n. [F. salp[^e]tre, NL. sal petrae, literally, rock salt, or stone salt; so called because it exudes from rocks or walls. See {Salt}, and {Petrify}.] (Chem.) Potassium nitrate; niter; a white… …   The Collaborative International Dictionary of English

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