merlon

n. solid narrow wall between two crenels in battlements

For the Paper Mario series character, see Merlon (Mario).A merlon, in architecture, forms the solid part of an embattled parapet, sometimes pierced by embrasures. The word comes from the French language, adapted from the Italian merlone, possibly a shortened form of mergola, connected with Latin mergae (pitchfork), or from a diminutive moerulus, from murus or moerus (a wall). An alternative etymology suggests that the medieval Latin merulus (mentioned from the end of the 10th century) functioned as a diminutive of Latin merle, expressing an image of blackbirds sitting on a wall.
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Noun
1. a solid section between two crenels in a crenelated battlement
(hypernym) rampart, bulwark, wall
(part-holonym) battlement, crenelation, crenellation

n. merlon

(n.)
One of the solid parts of a battlemented parapet; a battlement. See Illust. of Battlement.