Definition of electron noun from the Oxford Advanced Learner's Dictionary

 

electron

 noun
noun
BrE BrE//ɪˈlektrɒn//
 
; NAmE NAmE//ɪˈlektrɑːn//
 
(physics) Molecules and matter
 
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a very small piece of matter (= a substance) with a negative electric charge, found in all atoms see also neutron, proton Wordfinderantiparticle, atom, electron, ion, neutron, nucleus, particle, positron, proton, valency See related entries: Molecules and matter Word Origin late 19th cent.: from electric + -on.
See the Oxford Advanced American Dictionary entry: electron

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