rotor
/ˈrəʊtə(r)/noun
1- a rotary part of a machine or vehicle, in particular（机器、车辆或飞行器的）旋转部分, 尤指：
1.1
- a hub with a number of radiating aerofoils that is rotated in an approximately horizontal plane to provide the lift for a rotary wing aircraft（为旋转翼飞行器提供升力的）旋翼。
1.2
- the rotating assembly in a turbine, especially a wind turbine（涡轮机, 尤指风轮机的）旋转部件。
1.3
- the armature of an electric motor（电动机的）转子。
1.4
- （亦作rotor arm）the rotating part of the distributor of an internal-combustion engine which successively makes and breaks electrical contacts so that each spark plug fires in turn（内燃机配电器的）旋转臂。
1.5
- the rotating container in a centrifuge（离心机的）旋转器。
1.6
- the rotary winder of a clockwork watch（机械表的）旋转发条。
1.7
- Meteorology a large eddy in which the air circulates about a horizontal axis, especially in the lee of a mountain【气象】滚轴气团（尤指在山的背风区域绕水平轴线旋转的气团）。
词源
early 20th cent.: formed irregularly from ROTATOR.