Rotor may refer to:

Science and technology

Engineering

Rotor (electric) The rotor is a moving component of an electromagnetic system in the electric motor, electric generator, or alternator. Its rotation is due to the interaction between the windings and magnetic fields which produces a torque around the rot ...

, the non-stationary part of an alternator or electric motor, operating with a stationary element so called the stator *

Helicopter rotor A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) with a control system, that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aero ...

, the rotary wing(s) of a rotorcraft such as a helicopter * ROTOR, a former radar project in the UK following the Second World War * 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 distributor is an enclosed rotating switch used in spark-ignition internal combustion engines that have mechanically timed ignition. The distributor's main function is to route high voltage current from the ignition coil to the spark plu ...

, a component of the ignition system of an internal combustion engine * Pistonless rotary engine * Rotor (antenna)

Computing

Rotor machine In cryptography, a rotor machine is an electro-mechanical stream cipher device used for encrypting and decrypting messages. Rotor machines were the cryptographic state-of-the-art for much of the 20th century; they were in widespread use in the 1 ...

, 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 A centrifuge is a device that uses centrifugal force to separate various components of a fluid. This is achieved by spinning the fluid at high speed within a container, thereby separating fluids of different densities (e.g. cream from milk) or ...

, which also holds the samples *

Rigid rotor In rotordynamics, the rigid rotor is a mechanical model of rotating systems. An arbitrary rigid rotor is a 3-dimensional rigid object, such as a top. To orient such an object in space requires three angles, known as Euler angles. A special ri ...

, a mathematical model for rotating systems (usually molecules)

Medicine

Rotor syndrome Rotor syndrome (also known as Rotor type hyperbilirubinemia) is a rare cause of mixed direct (conjugated) and indirect (unconjugated) hyperbilirubinemia, relatively benign, autosomal recessive bilirubin disorder characterized by non-hemolytic j ...

, a rare liver disorder

Mathematics

* Rotor (mathematics), an even-graded multivector used to produce rotations and some other affine transformations *

Curl (mathematics) In vector calculus, the curl is a vector operator that describes the infinitesimal circulation of a vector field in three-dimensional Euclidean space. The curl at a point in the field is represented by a vector whose length and direction den ...

, known as rotor in some countries, a vector operator that shows a vector field's rate of rotation

Other uses

SC Rotor Volgograd SC Rotor Volgograd (russian: СK Ротор) is a Russian professional football club from the large city of Volgograd, Volgograd Oblast (formerly Stalingrad). The club will play in the third-tier Russian Football National League 2 in the 2022– ...

, 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 In ancient Greek religion, Nemesis, also called Rhamnousia or Rhamnusia ( grc, Ῥαμνουσία, Rhamnousía, the goddess of Rhamnous), was the goddess who personifies retribution, a central concept in the Greek world view. Etymology The n ...

'' *''

R.O.T.O.R. ''R.O.T.O.R.'' (also known as ''Blue Steel'' and ''R.O.T.O.R.: Police Force'') is a 1987 American science fiction action film starring Richard Gesswein, Jayne Smith and Margaret Trigg. The film has been described as a low-budget copy of ''The Te ...

'', a 1987 science fiction/action movie {{disambiguation