portcullis
portcullis (pôrtkŭl´Ĭs), grating or framework of strong bars of wood or iron, sharp-pointed at their lower ends, sliding vertically in the grooved jambs of a fortified portal as a protection in case of assault. First used in Roman times against Hannibal, the portcullis reached its highest development in the 12th cent. as a characteristic feature of the defensive system of a castle or fortified town. It could be dropped suddenly in a surprise attack. Through its grating the defenders could keep up a fire of arrows and other missiles. In the 14th cent., with the development of gunpowder, its tactical value was reduced.
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portcullis
port·cul·lis
/ pôrtˈkələs/
•
n.
a strong, heavy grating sliding up and down in vertical grooves, lowered to block a gateway to a fortress or town.
DERIVATIVES:
port·cul·lised adj.
portcullis
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