: 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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Transmuting actinides into isotopes Rosatom stated that fast neutron reactors can burn minor actinides by transmuting them into isotopes that are either stable or have shorter half-lives.
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Aman Tripathi, Interesting Engineering, 1 May 2026
For example, electromagnetic waves and neutron radiation from one piece of tech can cause semiconductors in another part to malfunction.
—Chelsea Gohd, Space.com, 1 May 2026
But for the weightier version, at least one of those hydrogen atoms is a heavier isotope such as deuterium—which, unlike a typical hydrogen atom, has one neutron.
—Joseph Howlett, Scientific American, 24 Apr. 2026
The idea was that the presence of a neutron would alter how electrons and muons perceive the proton’s charge.
—ArsTechnica, 14 Apr. 2026
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Aman Tripathi, Interesting Engineering, 1 May 2026
For example, electromagnetic waves and neutron radiation from one piece of tech can cause semiconductors in another part to malfunction.
—Chelsea Gohd, Space.com, 1 May 2026
But for the weightier version, at least one of those hydrogen atoms is a heavier isotope such as deuterium—which, unlike a typical hydrogen atom, has one neutron.
—Joseph Howlett, Scientific American, 24 Apr. 2026
The idea was that the presence of a neutron would alter how electrons and muons perceive the proton’s charge.
—ArsTechnica, 14 Apr. 2026
See All Example Sentences for neutron
Cite this Entry
“Neutron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutron. Accessed 6 May. 2026.
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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