noun

fouling

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Fouling (noun) means a build-up of unwanted material stuck to a surface, which stops it working properly.

noun

A build-up of unwanted material stuck to a surface, which stops it working properly.

"Probably, rifling evolved from the early observation of the feathers on an arrow-and from the practical results of cutting channels in a musket, originally to reduce fouling, then because it was found to improve accuracy of the shot." — Albert Manucy, The Era of Artillery § Rifling (1949)

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