E·lec·tro-mag·net·ic a. Of or pertaining to electromagnetism.
  Electro-magnetic engine, an engine in which the motive force is electro-magnetism.
  Electro-magnetic theory of light Physics, a theory of light which makes it consist in the rapid alternation of transient electric currents moving transversely to the direction of the ray.
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  electromagnetic
       adj : pertaining to or exhibiting magnetism produced by electric
             charge in motion; "electromagnetic energy"