As a noun casemate
is 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.
As an adjective casemated is
furnished with, protected by, or built like a casemate.
casemate
English
Noun
(
en 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.
References
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casemated
English
Adjective
(
-)
Furnished with, protected by, or built like a casemate.
- (Campbell)
(
Webster 1913)