lunette

lunette
[luːˈnɛt]
noun
  1. something crescent-shaped, in particular
    月牙形的物体,尤指
    ■an arched aperture or window, especially one in a domed ceiling
    (尤指在建筑物穹顶上的)弧形空间;半圆壁弧形窗
    ■a crescent-shaped or semicircular alcove containing something such as a painting or statue
    弧形(壁)画;弧形装饰物
    ■a fortification with two faces forming a projecting angle, and two flanks
    眼镜堡
    ■(Christian Church)a holder for the consecrated host in a monstrance
    (基督教)(在圣体匣内夹住圣饼的)新月形夹子(或水晶匣子)
    ■a ring fixed to a vehicle, by which it can be towed
    (车辆的)牵引环
语源
  1. late 16th cent. (denoting a semicircular horseshoe): from French, diminutive of lune 'moon', from Latin luna
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