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 research is unique because the heat and light are used not only to facilitate evaporation but also to control the flow of ions in saltwater and the flow of electrons in the nanodevice.
—
Ameya Paleja, Interesting Engineering, 20 Feb. 2026
The electron is magnetically oriented upward, say, in this imprint.
—Quanta Magazine, 13 Feb. 2026
This energy often comes from the ionizing continuum, a powerful, high-energy flashlight from the black hole that strips electrons from atoms.
—Paul Sutter, Space.com, 11 Feb. 2026
Neutron stars also have some of the strongest magnetic fields known in the universe — up to 10 trillion times the power of a refrigerator magnet, and enough turn gamma rays into electrons and positrons in a way manmade particle accelerators cannot hope to do, NASA explained.
—Adam Harrington, CBS News, 9 Feb. 2026
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Ameya Paleja, Interesting Engineering, 20 Feb. 2026
The electron is magnetically oriented upward, say, in this imprint.
—Quanta Magazine, 13 Feb. 2026
This energy often comes from the ionizing continuum, a powerful, high-energy flashlight from the black hole that strips electrons from atoms.
—Paul Sutter, Space.com, 11 Feb. 2026
Neutron stars also have some of the strongest magnetic fields known in the universe — up to 10 trillion times the power of a refrigerator magnet, and enough turn gamma rays into electrons and positrons in a way manmade particle accelerators cannot hope to do, NASA explained.
—Adam Harrington, CBS News, 9 Feb. 2026
See All Example Sentences for electron
Cite this Entry
“Electron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electron. Accessed 23 Feb. 2026.
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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