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A merlon is a solid interval between crenellations on a battlement. Crenellations are the notched or indented tops of castle walls, which alternate with merlons. These architectural features were integral to the defensive design of medieval castles. The term "merlon" originates from Italian and French, with its earliest use dating to around 1704.123

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  1. merlon
  2. crenellation
  3. castle

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