rotor
//ˈroʊ.tər//
Noun
rotorSingular
rotorsPlural
1
A rotating part of a machine, especially the rotating assembly of blades on a helicopter that provides lift.
The helicopter's rotor spins rapidly to generate lift.
2
The rotating armature of an electric motor or generator.
The technician replaced the damaged rotor in the electric motor.
3
A rotating disc in a cipher machine used for encoding messages.
The Enigma machine used multiple rotors to encrypt secret messages.