merlon

A solid portion between two crenels in a battlement or crenelated wall.

In fortification, the plain member of masonry or other material which separates two crenelles or embrasures; a cop. See battlement.

One of the solid parts of a battlemented parapet; a battlement. See Illust. of battlement.

Any of the projections between the embrasures of a battlement

a solid section between two crenels in a crenelated battlement