Etymology
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electromagnet (n.)

also electro-magnet, "magnet which owes its magnetic properties to electric current," 1822; see electro- + magnet.

updated on August 19, 2014

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Definitions of electromagnet from WordNet

electromagnet (n.)
a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.