- An opening between the corbels which support a
projecting parapet, or in the floor of a gallery or the roof of a
portal, shooting or dropping missiles upen 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.
- The act of discharging missiles or pouring burning
or melted substances upon assailants through such apertures.