Lunette(redirected from Half-lunette)
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a semicircular opening in a dome or wall, bounded horizontally along the bottom. Some lunettes serve as windows, and others, which resemble tympana, are often filled with paintings or sculpture.
a temporary or permament fortification open from the rear, consisting usually of one or two faces (sides turned toward the enemy), which are walls with a moat in front, covered by flanks (lateral sides covering the flanks). The garrison of a lunette was made up of from one to four companies. Lunettes were used from the middle of the 17th to the early 20th centuries.