1. The rotating armature of a motor or generator
   "The rotor coil spun rapidly inside the generator";
   - rotor coil
    
2. The revolving bar of a distributor
   "The mechanic replaced the worn rotor in the car's ignition system"
    
3. Rotating mechanism consisting of an assembly of rotating airfoils
   "there are horizontal rotors on a helicopter or compressor rotors in a jet engine"

Derived forms: rotors

Type of: armature, bar, rotating mechanism

Antonym: stator

Part of: chopper [informal], copter [informal], distributer, distributor, eggbeater [N. Amer, informal], electric motor, electrical distributor, generator, helicopter, jet engine, turbine, whirlybird [N. Amer, informal]

Encyclopedia: Rotor