Noun
A bombproof chamber, usually of masonry, in which cannon may be placed, to be fired through embrasures; or one capable of being used as a magazine, or for quartering troops.
A hollow molding, chiefly in cornices.
Source: Webster's dictionaryPhase III: casemate wall etc. In 15 BCE, during the third and final building phase, the entire site of Masada – except for the Northern Palace – was enclosed by a casemate wall. Source: Internet
Except for most American designs, tank destroyers were all turretless and had fixed or casemate superstructures. Source: Internet
The casemate wall included a double wall with a space between that was used as living chambers for the soldiers and as extra storage space. Source: Internet
The casemate was built of convert of oak and pine in several layers, topped with two convert layers of iron plating oriented perpendicular to each other, and angled at 36 degrees from horizontal to deflect fired enemy shells. Source: Internet
The Panzer 38(t) chassis was also used to make the Jagdpanzer 38 casemate style tank destroyer. Source: Internet
Casemate has a burgeoning publishing list covering subjects as diverse as Roman History and today's current conflicts. Source: Internet