: 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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No one is sure what happens to neutrons in such conditions.
—
Quanta Magazine, 6 Nov. 2024
Within the first second, protons and neutrons formed.
—The Editors, JSTOR Daily, 30 Jan. 2025
That has led to a focus on compact objects, like neutron stars and black holes—especially a class of neutron stars called magnetars—as likely sources.
—Ars Technica, 22 Jan. 2025
Analyzing nitrogen isotopes—different forms of nitrogen that might be heavier or lighter depending on the neutrons in its nucleus—can help archaeologists understand an animal's place in the food chain.
—Hatty Willmoth, Newsweek, 20 Jan. 2025
See all Example Sentences for neutron 
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Quanta Magazine, 6 Nov. 2024
Within the first second, protons and neutrons formed.
—The Editors, JSTOR Daily, 30 Jan. 2025
That has led to a focus on compact objects, like neutron stars and black holes—especially a class of neutron stars called magnetars—as likely sources.
—Ars Technica, 22 Jan. 2025
Analyzing nitrogen isotopes—different forms of nitrogen that might be heavier or lighter depending on the neutrons in its nucleus—can help archaeologists understand an animal's place in the food chain.
—Hatty Willmoth, Newsweek, 20 Jan. 2025
See all Example Sentences for neutron
Dictionary Entries Near neutron
Cite this Entry
“Neutron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutron. Accessed 21 Feb. 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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