: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
Examples of neutron in a Sentence
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Their daily tasks include handling fuel, maintaining reactor systems, and supporting experiments that require high neutron flux.
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Georgina Jedikovska, Interesting Engineering, 21 Nov. 2025
This inferno re-creates conditions from the dawn of time, when the universe was too hot and dense to form regular atoms—or even their ingredients such as protons and neutrons.
—Clara Moskowitz, Scientific American, 15 Nov. 2025
These protons stick together to create the nucleus of a helium atom, with two protons and two neutrons.
—Rhett Allain, Wired News, 12 Nov. 2025
On the one hand, there would be double-neutrino double-beta decay, where the parent nucleus would emit two electrons and two neutrinos, transforming two of the neutrons in the nucleus into protons in the process.
—Big Think, 28 Oct. 2025
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Georgina Jedikovska, Interesting Engineering, 21 Nov. 2025
This inferno re-creates conditions from the dawn of time, when the universe was too hot and dense to form regular atoms—or even their ingredients such as protons and neutrons.
—Clara Moskowitz, Scientific American, 15 Nov. 2025
These protons stick together to create the nucleus of a helium atom, with two protons and two neutrons.
—Rhett Allain, Wired News, 12 Nov. 2025
On the one hand, there would be double-neutrino double-beta decay, where the parent nucleus would emit two electrons and two neutrinos, transforming two of the neutrons in the nucleus into protons in the process.
—Big Think, 28 Oct. 2025
See All Example Sentences for neutron
Cite this Entry
“Neutron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutron. Accessed 30 Nov. 2025.
Copy CitationKids Definition
neutron
noun
neu·tron
ˈn(y)ü-ˌträn 
: an uncharged atomic particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
Medical Definition
neutron
noun
neu·tron
ˈn(y)ü-ˌträn
: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
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