Rotor

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
• Helicopter rotor, 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 component of the ignition system of an internal combustion engine
• Pistonless rotary engine
• Rotor (antenna)

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

Medicine, biology, chemistry

• The rotating part of a centrifuge, which also holds the samples
• Rotor syndrome, a rare liver disorder

Mathematics

• Rotor (mathematics), an n-blade object in geometric algebra, which rotates another n-blade object about a fixed or translated point
• 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
• Rotor (architecture), a Brussels-based collective practice.