Motor

A motor is a machine that converts some form of energy into mechanical energy. In some contexts, the word motor refers specifically to an internal combustion engine.

In various contexts, motor may specifically mean:

Electric motor, a machine that converts electricity into a mechanical motion
Molecular motors, the essential agents of movement in living organisms
Pneumatic motor, a machine that converts the energy of compressed air into mechanical motion
Hydraulic Motor, a hydraulic machine that converts the energy of pressurized liquid flow into mechanical motion.
Synthetic molecular motors and [nanomotors]

-and the word is commonly used with the following:

Motor car (see automobile)
Motor neuron - neurons that originate in the spinal cord and synapse with muscle fibers (see motoneuron)
Motor vehicle (see automobile)

See also