electron

noun

elec·​tron i-ˈlek-ˌträn How to pronounce electron (audio)
: 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

Recent Examples on the Web
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Combine that with its 33.5-inch (85-cm) water fording depth and steep approach angles, and the G 580 is a serious off-roader, just one that runs on electrons instead of dinosaur juice. New Atlas, 2 Aug. 2025 Photonics computers, which use light photons instead of electrons for data transmission and processing, are already being manufactured in the quantum realm. Chuck Brooks, Forbes.com, 1 Aug. 2025 All lightning is an electric discharge — much like a static shock, just on a larger scale. Inside a thunderstorm, ice and water particles collide and exchange electrons, creating a buildup of electric charge. Tyler Ory, CNN Money, 31 July 2025 Since liquid water likely exists underneath the surface of Using computer simulations to calculate the energy deposition and electron production rates of radiolysis, the researchers found that metabolic activity could be sustained at certain depths of all three bodies. Jack Knudson, Discover Magazine, 29 July 2025 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

Cite this Entry

“Electron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electron. Accessed 7 Aug. 2025.

Kids Definition

electron

noun
elec·​tron i-ˈlek-ˌträn How to pronounce electron (audio)
: 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 How to pronounce electron (audio)
: 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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