neutrino
noun
neu·tri·no
nü-ˈtrē-(ˌ)nō 
nyü-
plural neutrinos
: an uncharged elementary particle that is believed to have a very small mass, that has any of three forms, and that interacts only rarely with other particles
Examples of neutrino in a Sentence
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These particles, known as cosmic rays, are mostly composed of single protons, although heavier atomic nuclei, electrons, positrons (the antimatter counterpart of electrons), and neutrinos are all present as well.
—
Ethan Siegel, Big Think, 4 Sep. 2025
The particles come in three types, constantly morphing from one to another in a phenomenon called neutrino oscillation.
—Mrigakshi Dixit, Interesting Engineering, 26 Aug. 2025
Some current estimates tackle this by putting the neutrino's mass as non-zero but with a negative value, something that is very troubling to physicists, as negative mass isn't something currently thought to be possible.
—Robert Lea, Space.com, 24 Aug. 2025
Precise observations of solar neutrinos also point to new physics.
—Bruce Dorminey, Forbes.com, 12 Aug. 2025
See All Example Sentences for neutrino
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Ethan Siegel, Big Think, 4 Sep. 2025
The particles come in three types, constantly morphing from one to another in a phenomenon called neutrino oscillation.
—Mrigakshi Dixit, Interesting Engineering, 26 Aug. 2025
Some current estimates tackle this by putting the neutrino's mass as non-zero but with a negative value, something that is very troubling to physicists, as negative mass isn't something currently thought to be possible.
—Robert Lea, Space.com, 24 Aug. 2025
Precise observations of solar neutrinos also point to new physics.
—Bruce Dorminey, Forbes.com, 12 Aug. 2025
See All Example Sentences for neutrino
Cite this Entry
“Neutrino.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutrino. Accessed 9 Sep. 2025.
Copy CitationKids Definition
neutrino
noun
neu·tri·no
n(y)ü-ˈtrē-nō
plural neutrinos
: an uncharged elementary particle believed to have little or no mass
Medical Definition
neutrino
noun
neu·tri·no
n(y)ü-ˈtrē-(ˌ)nō
plural neutrinos
: an uncharged elementary particle that is believed to be massless or to have a very small mass, that has any of three forms, and that interacts only rarely with other particles
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