Casemate

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casemate

[′kās‚māt]
(ordnance)
A bombproof structure used as a powder magazine, gun emplacement, or the like.

Casemate

 

(1) An area in a fortification for the protection of personnel from direct hits by artillery shells and aerial bombs. Prototypes of casemates were known in ancient times. The perfection of artillery and the appearance of aviation provided the impetus for the widespread development of casemates. Depending on its purpose, a casemate is called a combat, observation, living, or ammunition casemate. It is customary to call all those modern fortifications with casemates as casemated, distinguished from open fortifications.

(2) An armored enclosed area on ships for the installation of guns, the storage of shells, and the protection of personnel from enemy fire. Casemates were widely used on artillery ships in the second half of the 19th century and the first half of the 20th century. Because of changes in warship design (in particular armor plating), casemates have almost completely lost their importance.

(3) Before the 20th century, an isolation cell in a prison located in a former fortress, primarily for the detention of political prisoners.

casemate

A vault or chamber in a bastion, having openings for the firing of weapons.
References in periodicals archive ?
In any event, Castle Williams produced such a profound effect and brought so much credit to the Corps that when distinctive buttons were designed a few years later (probably about 1812), they were made to embody a casemated, embrasured, crenelated battery of masonry defending a waterway, with a National eagle over the center.
1807--Jonathan Williams began construction of the first casemated battery in this country at what is now Governor's Island.