Etymology
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electron (n.)

coined 1891 by Irish physicist George J. Stoney (1826-1911) from electric + -on, as in ion (q.v.). Electron microscope (1932) translates German Elektronenmikroskop.

updated on August 10, 2014

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Definitions of electron from WordNet

electron (n.)
an elementary particle with negative charge;
Synonyms: negatron
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.