Bible Encyclopedias
Machicolation

1911 Encyclopedia Britannica

(from Fr. machicoulis), an opening between a wall and a parapet, formed by corbelling out the latter, so that the defenders might throw down stones, melted lead, &c., upon assailants below.

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Machicolation'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​m/machicolation.html. 1910.