carbon brush


General Science


  • noun a small, replaceable, carbon block found in electric motors, generators and alternators, which provides the passage of electric current

Cars & Driving

  • noun rubbing electrical contact in the form of a carbon block or rod which bears against another member, such as a commutator, collector ring or slip ring, to provide passage for an electric current, e.g. from an external source to the armature of a motor, as in a starter, or from the rotor of an alternator via slip rings to an external circuit


  • A brush composed of carbon, or another material that incorporates carbon. Such a brush may be made of amorphous carbon, or carbon and copper, and may be used in motors, generators, or potentiometers.