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
nü-ˈtrē-(ˌ)nō-ləs How to pronounce neutrino (audio)
nyü-
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.
These solar neutrinos are still traveling close to the speed of light, but their energy has been too low to register on any previous experiment’s instruments. — Joseph Howlett, Scientific American, 31 Aug. 2026 Run by a multi-university collaborative and funded by NASA, the array of radio antennas suspended from a stratospheric balloon was devised to study neutrinos – fast-traveling elementary particles with no electrical charge. — Diya Chacko, Oc Register, 26 Aug. 2026 Blazars, like the one central to this study, designated PKS 2233-148, have long been proposed to be the cosmic particle accelerators that blast out neutrinos. — Robert Lea, Space.com, 19 Aug. 2026 These interactions can produce high-energy photons and potentially neutrinos, creating signals that could be studied across different forms of astronomical observation. — Neetika Walter, Interesting Engineering, 17 Aug. 2026 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

Rhymes for neutrino

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Browse Nearby Words

neutretto
neutrino
neutro-
See all Nearby Words

Cite this Entry

“Neutrino.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutrino. Accessed 2 Sep. 2026.

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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

More from Merriam-Webster on neutrino

Britannica.com: Encyclopedia article about neutrino

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