neu·tri·no | \ nü-ˈtrē-(ˌ)nō , nyü- \
plural neutrinos

Definition of neutrino 

: 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

Keep scrolling for more

Other words from neutrino

neutrinoless \nü-ˈtrē-(ˌ)nō-ləs, nyü- \ adjective

Examples of neutrino in a Sentence

Recent Examples on the Web

For every individual high-energy neutrino hit, Halzen said, roughly 10,000 or 100,000 more pass through unscathed. Amina Khan,, "After years of searching, scientists finally trace high-energy neutrinos to a distant blazar," 12 July 2018 Completed in 2010, the IceCube neutrino detector snares these elusive particles in a cubic kilometer of Antarctic ice. Daniel Clery, Science | AAAS, "Ghostly particle caught in polar ice ushers in new way to look at the universe," 12 July 2018 The neutrino is nearly massless and flies through space at almost the speed of light. Mark Bowen, Scientific American, "Neutrinos on Ice: Astronomers' Long Hunt for Source of Extragalactic "Ghost Particles" Pays Off," 12 July 2018 The discovery of a single neutrino was made in September by the IceCube Neutrino Observatory at the South Pole, and confirmed by telescopes around the globe and in Earth's orbit. Doyle Rice, USA TODAY, "'Ghost particles' from outer space: Scientists discover distant source of neutrinos," 12 July 2018 There are three types of antineutrino just as there are three types of regular neutrino—electron, muon, and tau. Avery Thompson, Popular Mechanics, "New Experiment Hints at Why the Universe Is Made of Something Rather Than Nothing," 8 Aug. 2016 In a study published in the journal Science, researchers have determined that a supermassive black hole like this one is the source of high-energy neutrinos detected on Earth. Fox News, "Scientists capture mysterious 'ghost particle' in a giant ice cube in 'triumph' that changes how we see the universe," 13 July 2018 Other neutrino detectors have been built a mile and a half beneath the Mediterranean Sea off the French coast and more than a kilometer below Lake Baikal in southeastern Russia. Mark Johnson, Milwaukee Journal Sentinel, "Blazing a trail: UW professor's dream leads to breakthrough in identifying origin of cosmic rays," 12 July 2018 On average, this occurred once every eight weeks or so in the nineteen months before this particular neutrino was detected. Eoin O'carroll, The Christian Science Monitor, "Neutrino demonstration heralds a new way of observing the cosmos," 12 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'neutrino.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of neutrino

1934, in the meaning defined above

History and Etymology for neutrino

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

Keep scrolling for more

Learn More about neutrino

Statistics for neutrino

Last Updated

20 Sep 2018

Look-up Popularity

Time Traveler for neutrino

The first known use of neutrino was in 1934

See more words from the same year

Keep scrolling for more

More Definitions for neutrino



English Language Learners Definition of neutrino

physics : a particle that is smaller than an atom and that has no electrical charge


neu·tri·no | \ n(y)ü-ˈtrē-(ˌ)nō \
plural neutrinos

Medical Definition of neutrino 

: 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

See words that rhyme with neutrino Encyclopedia article about neutrino

Comments on neutrino

What made you want to look up neutrino? Please tell us where you read or heard it (including the quote, if possible).


the setting in which something occurs

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!