- 回旋加速器 huíxuánjiāsùqì cyclotron(physics) cyclotron
- 回旋处 huíxuánchù roundabouttraffic circle; rotary; roundabout
- 回旋标 huíxuánbiāo boomerangcurved wooden tool that can be thrown as a weapon or for sport, often returning to the thrower
- 回旋镖 huíxuánbiāo boomerangA tool or weapon that, when thrown, uses rotation and air friction to change direction and return to its origin; historically used for hunting.