Mach`i*co*la"tion (?), n. [Cf. LL.
machicolamentum, machacolladura, F.
mâchicolis, mâchecoulis; perh. fr. F.
mèche match, combustible matter + OF. coulis,
couleis, flowing, fr. OF. & F. couler to flow. Cf.
Match for making fire, and Cullis.]
1. (Mil. Arch.) An opening between the
corbels which support a projecting parapet, or in the floor of a
gallery or the roof of a portal, for shooting or dropping missiles
upon assailants attacking the base of the walls. Also, the
construction of such defenses, in general, when of this character.
See Illusts. of Battlement and Castle.
2. The act of discharging missiles or pouring
burning or melted substances upon assailants through such
apertures.