ro·tor
noun/ˈrəʊtə(r)/
/ˈrəʊtər/
- a part of a machine that turns around a central point
enlarge image（机器的）转子，转动部件 - rotor blades on a helicopter
直升机的旋翼桨叶
Oxford Collocations DictionaryRotor is used before these nouns:- blade
Word Originearly 20th cent.: formed irregularly from rotator. - rotor blades on a helicopter