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

neutrinoless

nü-ˈtrē-(ˌ)nō-ləs 

nyü-

adjective

Examples of neutrino in a Sentence

Recent Examples on the Web

Particle physicists are investigating whether the right-handed neutrino exists or if neutrinos’ mirror images are simply identical, which could help explain why the universe contains something rather than nothing. —Zack Savitsky, Wired News, 22 June 2025

Models that accommodate a changing dark energy inevitably conclude that a class of tiny fundamental particles known as neutrinos have a negative mass. —Lyndie Chiou, Scientific American, 30 Apr. 2025

Detecting neutrinos on Earth allows researchers to trace them back to their sources. —Ashley Strickland, CNN, 12 Feb. 2025

However, this ghostly nature also makes neutrinos incredibly tough to detect. —Robert Lea, Space.com, 17 June 2025

Word History

Etymology

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

First Known Use

1934, in the meaning defined above

Rhymes for neutrino

• amino
• carlino
• casino
• imino
• ladino
• latino
• merino
• argentino
• campesino
• cappuccino
• diamino
• filipino

Kids 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