electron

noun

elec·tron i-ˈlek-ˌträn

: 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

Examples of electron in a Sentence

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Researchers demonstrated those effects using a quantum anomalous Hall (QAH) insulator, a magnetic topological material that blocks electrical current through its interior but allows electrons to travel along its edges in only one direction. — Aamir Khollam, Interesting Engineering, 10 July 2026 The department had ordered a test called transmission electron microscopy, which uses an electron microscope to magnify and spot asbestos particles. — Miceala Morano, Arkansas Online, 8 July 2026 In aggregate, Americans in retail choice markets paid almost $4 billion in overcharges to receive the same electrons that everyone else receives. — Ed Hirs, Forbes.com, 8 July 2026 Researchers know that a nuclear detonation in orbit would flood the space around Earth with fast, energetic electrons. — Tereza Pultarova, Space.com, 8 July 2026 See All Example Sentences for electron

Word History

Etymology

electr- + -on entry 2

First Known Use

1891, in the meaning defined above

Time Traveler

The first known use of electron was in 1891

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Cite this Entry

Style

“Electron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electron. Accessed 12 Jul. 2026.

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Kids Definition

electron

noun

elec·tron i-ˈlek-ˌträn

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

Medical Definition

electron

noun

elec·tron i-ˈlek-ˌträn

: 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

electron

noun

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electron

noun

Examples of electron in a Sentence

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Phrases Containing electron

Rhymes for electron

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Kids Definition

Medical Definition

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