弓形的英文：
Arc
arch
lune

Heavy, slightly arched, tapering from shoulders to back of skull. No looseness of skin. Medium length.
颈部粗大，稍有弓形，自肩至脑后收缩，皮肤紧绷不松弛，中等长度。

The arteria arcuata courses along beneath the cortex parallel to the capsular surface
该弓形动脉在皮质下行走，同肾包膜面相平行。

A bend or curve,especially in a shoreline.
弯曲，弓形弯曲或弓形，尤指海岸线

Brace Bit
弓形手钻嘴

Bowleg:a leg having an outward curvature in the region of the knee.
弓形腿:在膝盖处外弯的腿。

The trees arch over the river.
树的枝叶成弓形遮覆河上。

The cat's back hooped under his hand.
猫背在他的抚摸下卷缩成弓形。

A harshness in some tones of a bowed stringed instrumentis is produced by defective vibration.
弓形弦乐器的杂音是由一些音震荡不准产生的。

The iron rod support the valance is bend in an arc.
挂窗帘上部短幔的铁棍弯成了个弓形。

She also recommends arch support.
她同样推荐鞋底有弓形结构的鞋子。

piercing by electric arc
电弧穿孔

The beach swept around in an arc.
海滩呈弧形伸展开来。

The secant of the complement of a directed angle or arc.
余割有向角的余角或弧的余割

Arched: Forming an arch or a curve like that of an arch.
拱形结构的:形成拱或类似于拱的曲线。

A rainbow arched across the sky.
一道彩虹横跨天际。

Three arches sustain the bridge.
三个拱形礅支撑着那座桥。

On our spherical earth each segment delineates a lune called a time zone
在我们这第一个球形的地球上，被划成月牙形的每一个等分称为一个时区。