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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The breakthrough dramatically boosts the power of attosecond light used to probe the fastest electron motions in atoms and materials.
—
Neetika Walter, Interesting Engineering, 5 Nov. 2025
One idea suggests that the electron-positron pairs are deflected by weak intergalactic magnetic fields and that this bounces low-energy gamma-rays out of our line of sight.
—Robert Lea, Space.com, 5 Nov. 2025
Similarly, the Sun’s nuclear reactions should be producing regular electron neutrinos, with the energy of those neutrinos falling into an easily calculable range.
—Big Think, 28 Oct. 2025
Several minutes later, electrons and protons may arrive in enormous quantities, dramatically increasing radiation in Earth’s magnetosphere.
CMEs, meanwhile, hurtle through space at up to three thousand kilometers per second.
—Literary Hub, 27 Oct. 2025
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Neetika Walter, Interesting Engineering, 5 Nov. 2025
One idea suggests that the electron-positron pairs are deflected by weak intergalactic magnetic fields and that this bounces low-energy gamma-rays out of our line of sight.
—Robert Lea, Space.com, 5 Nov. 2025
Similarly, the Sun’s nuclear reactions should be producing regular electron neutrinos, with the energy of those neutrinos falling into an easily calculable range.
—Big Think, 28 Oct. 2025
Several minutes later, electrons and protons may arrive in enormous quantities, dramatically increasing radiation in Earth’s magnetosphere.
CMEs, meanwhile, hurtle through space at up to three thousand kilometers per second.
—Literary Hub, 27 Oct. 2025
See All Example Sentences for electron
Cite this Entry
“Electron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electron. Accessed 9 Nov. 2025.
Copy CitationKids 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
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