Rotor
WordNet
noun
(1) Rotating mechanism consisting of an assembly of rotating airfoils
"There are horizontal rotors on a helicopter or compressor rotors in a jet engine"
(2) The rotating armature of a motor or generator
(3) The revolving bar of a distributor
WiktionaryText
Noun
- A rotating part of a mechanical device, for example in an electric motor, generator, alternator or pump.
- The wing of a helicopter or similar aircraft