lunette

• 名词，指一种独立的半月形堡垒（防御工事），也指穹顶或拱顶上让光线通过的圆形或椭圆形开口（采光孔）。

A noun referring to a temporary fortification resembling a detached bastion, or an oval or circular opening in a dome or vault that allows light to enter.

1. FortificationC1formal

   A temporary defensive structure resembling a detached bastion, often used in military engineering.

   眼镜堡

   • The army constructed a lunette to protect the flank of the main fort.
   • Engineers designed the lunette to withstand heavy artillery fire.
   • Historical maps show the lunette positioned near the eastern wall.

   同义词half-moon

2. Architectural featureC1formal

   An oval or circular opening in a dome or vault, designed to admit light.

   建筑构件

   • The lunette above the altar allowed soft light to illuminate the chapel.
   • Renaissance architects often included lunettes in their cathedral designs.
   • The vault's lunette was decorated with intricate stained glass.