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- "Motor". Dictionary.reference.com. http://dictionary.reference.com/browse/motor. Retrieved 2011-05-09. "a person or thing that imparts motion, esp. a contrivance, as a steam engine, that receives and modifies energy from some natural source in order to utilize it in driving machinery."
- Dictionary.com: (World heritage) "3. any device that converts another form of energy into mechanical energy so as to produce motion"
- Comparison of motors
- Generator: can be the exact opposite of a motor (ie electric motor compared to electricity generator)