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An ingine or motor is a machine designed tae convert energy intae uisefu mechanical motion.[1][2] Heat ingines, includin internal combustion ingines an freemit combustion ingines (like steam ingines) burn a fuel tae create heat, that then creates motion. Electric motors convert electrical energy intae mechanical motion, pneumatic motors uise compressed air an ithers — like clockwirk motors in wind-up toys — uise elastic energy. In biological seestems, molecular motors, lik myosins in muscles, uise chemical energy tae create motion.

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  1. "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. 
  2. (World heritage) "3. any device that converts another form of energy into mechanical energy so as to produce motion"