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 simulations allowed the team to examine how electrons move across metal-semiconductor interfaces and determine the critical tunneling length, the point at which electron leakage begins to affect transistor performance.
—
Neetika Walter, Interesting Engineering, 16 June 2026
Li’s team used cryo-electron microscopy to examine the bacterium’s subcellular structures and capture detailed images of its inner workings.
—Quanta Magazine, 10 June 2026
Today experts assert that dark matter particles could fall within an overwhelmingly large mass range—anywhere between trillionths of an electron’s mass to about 1,000 times the mass of a proton.
—Jonathan O'Callaghan, Scientific American, 4 June 2026
Feynman had a really interesting theory that all of reality is just a single electron moving through spacetime at a bunch of different convergences.
—Seth Abramovitch, HollywoodReporter, 28 May 2026
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Neetika Walter, Interesting Engineering, 16 June 2026
Li’s team used cryo-electron microscopy to examine the bacterium’s subcellular structures and capture detailed images of its inner workings.
—Quanta Magazine, 10 June 2026
Today experts assert that dark matter particles could fall within an overwhelmingly large mass range—anywhere between trillionths of an electron’s mass to about 1,000 times the mass of a proton.
—Jonathan O'Callaghan, Scientific American, 4 June 2026
Feynman had a really interesting theory that all of reality is just a single electron moving through spacetime at a bunch of different convergences.
—Seth Abramovitch, HollywoodReporter, 28 May 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 22 Jun. 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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