gun·pow·der   (g n pou d r) n. Any of various explosive powders used to propel projectiles from guns, especially a black mixture of potassium nitrate, charcoal, and sulfur.

gunpowder, explosive mixture; its most common formula, called "black powder," is a combination of saltpeter, sulfur, and carbon in the form of charcoal.

gunpowder n. Any of various explosive powders used to propel projectiles from guns, especially a black mixture of potassium nitrate, charcoal, and

Gunpowder is a an explosive mixture of sulfur, charcoal and potassium nitrate (also known as saltpetre/saltpe ter) that burns rapidly, producing volumes of hot solids and gases which can be used as a propellant in firearms and as a pyrotechnic composition in fireworks. Gunpowder is classified as a low explosive because of its slow decomposition rate and consequently low brisance.Gunpowd er (black powder) · Sulfur-free gunpowder · History

Black powder is used as a propellant for bullets, as well as for fireworks and rocketry. Learn how gunpowder works and a bit about its history

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The Gunpowder Plot Society ... November 5, 1605, a solitary figure is arrested in the cellars of Parliament House.

Gunpowder is an extremely simple substance. Indeed, it is not even a compound, being merely a mixture of potassium nitrate, common charcoal, and sulphur.

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Definition from Wiktionary, a free dictionary