: 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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The assembly is designed for use in fourth-generation fast neutron reactors and features mixed nitride uranium-plutonium (SNUPP) fuel that incorporates a liquid metal sublayer.
—
Aman Tripathi, Interesting Engineering, 30 Oct. 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
Gluons carry the strong nuclear force, which glues together fundamental particles called quarks to make protons and neutrons.
—Stephanie Pappas, Scientific American, 27 Oct. 2025
The relation is derived partially from the principles of quantum chromodynamics, or QCD, which is the theory of how the strong force binds particles called quarks to form particles such as neutrons.
—Keith Cooper, Space.com, 24 Oct. 2025
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Aman Tripathi, Interesting Engineering, 30 Oct. 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
Gluons carry the strong nuclear force, which glues together fundamental particles called quarks to make protons and neutrons.
—Stephanie Pappas, Scientific American, 27 Oct. 2025
The relation is derived partially from the principles of quantum chromodynamics, or QCD, which is the theory of how the strong force binds particles called quarks to form particles such as neutrons.
—Keith Cooper, Space.com, 24 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 3 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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