Mĕr'lon, n.

noun

n. [Fr. & Sp. mer-lon, Pg. merlâo, It. merlo, merla, from Lat. mœrus, for murus, wall, dim. mœrulus.] (Fort.) That part of a parapet which lies between two embrasures.

Two raised merlons are shown as part of a crenellated wall. — m m, merlons.