Rotor may refer to:
Science and technology Engineering Rotor (electric), the non-stationary part of an alternator or electric motor, operating with a stationary element so called the stator ROTOR, a former radar project in the UK following the Second World War Rotor (antenna) In mechanical engineering, the rotor is a part of a machine that rotates about its own axis. Helicopter rotor, the rotary wing(s) of a rotorcraft such as a helicopter Rotor (turbine), the rotor of a turbine powered by fluid pressure Rotor (crank), a variable-angle bicycle crank Rotor (brake), the disc of a disc brake, in U.S. terminology Rotor (brake mechanism), a device that allows the handlebars and fork to revolve indefinitely without tangling the rear brake cable - see Detangler Rotor (distributor), a component of the ignition system of an internal combustion engine Pistonless rotary engine
Computing Rotor machine, the rotating wheels used in certain cipher machines, such as the German Enigma machine Rotor (Enigma machine), a rotating part of the German Enigma machine Rotor (software project), the former code name for Microsoft's shared source implementation of its Common Language Infrastructure
Chemistry The rotating part of a centrifuge, which also holds the samples Rigid rotor, a mathematical model for rotating systems (usually molecules)
Medicine
Rotor syndrome, a rare liver disorder
Mathematics Rotor (mathematics), an even-graded multivector used to produce rotations and some other affine transformations Curl (mathematics), known as rotor in some countries, a vector operator that shows a vector field's rate of rotation
Other uses SC Rotor Volgograd, a Russian football club Rotor (Sonic the Hedgehog), a fictional character from the Sonic the Hedgehog universe Rotor (ride), the trade name for an amusement ride Rotor (meteorology), a turbulent horizontal vortex that forms in the trough of lee waves Rotor, a space colony in Isaac Asimov's novel Nemesis R.O.T.O.R., a 1987 science fiction/action movie