electron

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noun elec·tron \i-ˈlek-ˌträn\

Definition of electron

  1. :  an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109 × 10−31 kilogram or about 11836 that of a proton

Origin and Etymology of electron

electr- + 2-on


First Known Use: 1891


ELECTRON Defined for English Language Learners

electron

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noun elec·tron \i-ˈlek-ˌträn\

Definition of electron for English Language Learners

  • physics : a very small particle of matter that has a negative charge of electricity and that travels around the nucleus of an atom


ELECTRON Defined for Kids

electron

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noun elec·tron \i-ˈlek-ˌträn\

Definition of electron for Students

  1. :  a very small particle that has a negative charge of electricity and travels around the nucleus of an atom


Medical Dictionary

electron

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noun elec·tron \i-ˈlek-ˌträn\

Medical Definition of electron

  1. :  an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109534 × 10−28 gram or about 11836 that of a proton



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