Definitions for "Casemate"
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 mortar-bomb or shell-proof chamber located within the walls of defensive works; generally pierced with openings for weapons; loopholes for muskets or embrasures for cannon.
A shell-proof chamber or tunnel within the walls of defensive works, usually pierced with loopholes for muskets or embrasures for cannon.
Keywords:  cornices, chiefly, hollow, molding
A hollow molding, chiefly in cornices.