Webster's Revised Unabridged Dictionary · 1913

Electro-magnetic

Electro-magnetic , adjective

Of or pertaining to electromagnetism.
Collocations (2)
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.