electron

noun elec·tron \ i-ˈlek-ˌträn \
Updated on: 5 Dec 2017

Definition of electron

: 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 ¹/₁₈₃₆ that of a proton

Recent Examples of electron from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'electron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of electron

electr- + 2-on


ELECTRON Defined for English Language Learners

electron

noun

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

noun elec·tron \ i-ˈlek-ˌträn \

Definition of electron for Students

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

Medical Dictionary

electron

noun elec·tron \ i-ˈlek-ˌträn \

medical Definition of electron

: 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 ¹/₁₈₃₆ that of a proton


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