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Definition of electromagnetism noun from the Oxford Advanced American Dictionary

 

electromagnetism

 noun
noun
NAmE//ɪˌlɛktroʊˈmæɡnəˌtɪzəm//
 
[uncountable] (physics)
 
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the production of a magnetic field by means of an electric current, or of an electric current by means of a magnetic field
See the Oxford Advanced Learner's Dictionary entry: electromagnetism