弧 (w)

(hú) arc

弧光 (w)

(húguāng) arc light

弧光灯 (w)

(húguāngdēng) arc lamp

弧度 (w)

(húdù) radian

弧形 (w)

(húxíng) arch

弧线 (w)

(húxiàn) arc (of curve); curve; curved line; arched

弧线长 (w)

(húxiàncháng) arc length; length of a curve segment

弧长 (w)

(húcháng) arc length (the length of a curve segment)

弧长参数 (w)

(húchángcānshù) parametrization by arc length (of a space curve)