, in Architecture, an angle or corner of stone or brick walls. When these stand out beyond the rest of the wall, their edges being chamferred off, they are called rustic Quoins.
Quoin, in Artillery, is a loose wedge of wood, which | is put in below the breech of a cannon, to raise or depress it more or less.
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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.
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