gunpowder

n. explosive powder used in guns and for blasting

Gunpowder is a pyrotechnic composition, an explosive mixture of sulfur, charcoal and potassium nitrate that burns rapidly, producing volumes of hot gas which can be used as a propellant in firearms and fireworks.Because of its slow decomposition rate and consequently low brisance, gunpowder is classified as a low explosive, that is, it produces a subsonic deflagration wave rather than the supersonic detonation wave produced by brisants, or high explosives. The gases produced by burning gunpowder generates enough pressure to propel a bullet, but not enough to destroy the barrel of a firearm. This makes gunpowder less suitable for shattering rock or fortifications, applications where high explosives such as TNT are preferred.
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Noun
1. a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
(synonym) powder
(hypernym) explosive

(n.)
A black, granular, explosive substance, consisting of an intimate mechanical mixture of niter, charcoal, and sulphur. It is used in gunnery and blasting.
  

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