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.
The energy from these events is carried away by particles of light (photons) spread across the electromagnetic spectrum, but also by neutrinos. — Robert Lea, Space.com, 10 July 2026 The lab also found a third fundamental particle, the tau neutrino, in 2000. — Kori Rumore, Chicago Tribune, 27 June 2026 Finding neutrinos using gravitational lenses could also enable a deeper study of the ghost particles, which still prove mysterious despite their detection for decades. — Ashley Strickland, CNN Money, 26 June 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-
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Cite this Entry

“Neutrino.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutrino. Accessed 14 Jul. 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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