An opening between corbels that support a projecting parapet, or in the floor of a gallery or the roof of a portal, of a fortified building from which missiles can be shot or heated items dropped upon assailants attacking the base of the walls.
A projecting parapet with a series of such openings.
Related
Narrower meaning words
box machicolation
slit machicolation, slot machicolation
Origin
From Late Latin machicolamentum ("machicolation") -ation. Machicolamentum may be derived from Old French macher (modern French mâcher) + col + Latin -mentum. The English word is cognate with Middle English machecolled, machecolling, Middle French machecoleis (modern French mâchicoulis), Latin machecollum, Occitan machacol.
Modern English dictionary
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