Martello towerMar·tel·lo tower
any of the circular forts of masonry built in the 19th cent. by the British on coasts to protect against invaders
Origin of Martello towerItalian martello, a hammer, folk etymology substitution for mortella, a tower, after Mortella, cape in Corsica, where such a tower was attacked by the English fleet (1794)
A short, circular tower, usually made of stone and located near a shoreline as a defensive fortification.
Origin of Martello towerAfter Cape Martello, Corsica, where such a tower was taken by British forces in 1794.
(plural Martello towers)