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neutrino

noun

neu·​tri·​no nü-ˈtrē-(ˌ)nō How to pronounce neutrino (audio)
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
neutrinoless adjective

Examples of neutrino in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The mass hierarchy affects how neutrinos and antineutrinos oscillate differently — a key part of the search for CP violation. Sharmila Kuthunur, Space.com, 4 Dec. 2025 However, the results showed no trace of a sterile neutrino. Mrigakshi Dixit, Interesting Engineering, 3 Dec. 2025 China publishes new neutrino observatory results The first results from China’s new neutrino observatory were published, hopeful signs both for the hunt for new physics and for China’s status as a scientific superpower. semafor.com, 27 Nov. 2025 Buried 700 meters beneath the rolling hills of southern China, an enormous neutrino observatory called JUNO has released its first results after a mere 59 days of operation. Jeanna Bryner, Scientific American, 26 Nov. 2025 See All Example Sentences for neutrino

Word History

Etymology

Italian, from neutro neutral, neuter, from Latin neutr-, neuter

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of neutrino was in 1934

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Cite this Entry

“Neutrino.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutrino. Accessed 8 Dec. 2025.

Kids Definition

neutrino

noun
neu·​tri·​no n(y)ü-ˈtrē-nō How to pronounce neutrino (audio)
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 How to pronounce neutrino (audio)
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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