1a: an opening between the corbels of a projecting parapet or in the floor of a gallery or roof of a portal for discharging missiles upon assailants below — see battlement illustration
b: a gallery or parapet containing such openings
2: construction imitating medieval machicolation
Other Words from machicolation
machicolated\mə-ˈchi-kə-ˌlā-təd \adjective
First Known Use of machicolation
1787, in the meaning defined at sense 1a
History and Etymology for machicolation
Medieval Latin machicolare to furnish with machicolations, from Middle French machicoller, from machicoleis machicolation, from macher to crush + col neck, from Latin collum — more at collar