antineutrino

American  

[an-tee-noo-tree-noh, -nyoo-, an-tahy-] / ˌæn ti nuˈtri noʊ, -nju-, ˌæn taɪ- /

noun

Physics.

• antineutrinos
  plural

1. the antiparticle of a neutrino, distinguished from the neutrino by having clockwise rather than counterclockwise spin when observing in the direction of motion.

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antineutrino British  

/ ˌæntɪnjuːˈtriːnəʊ /

noun

1. the antiparticle of a neutrino; a particle having oppositely directed spin to a neutrino, that is, spin in the direction of its momentum

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antineutrino Scientific  

/ ăn′tē-no̅o̅-trē′nō,ăn′tī- /

1. The antiparticle that corresponds to the neutrino.

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Other Word Forms

Noun Inflected Forms

• antineutrinos
  plural

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Etymology

Origin of antineutrino

First recorded in 1930–35; anti- + neutrino

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Example Sentences

See Examples For:

antineutrino antineutrinos

Over that period, the detector recorded around 100 antineutrino candidate events linked to residual radioactivity in the reactor cores and nearby spent-fuel cooling pools.

From Science Daily ● Aug. 14, 2026

The findings show that antineutrino detectors can gather information about nuclear reactors even while they are shut down, potentially creating new opportunities for reactor monitoring, nuclear safety, and safeguards.

From Science Daily ● Aug. 14, 2026

Electron scattering experiments measure where an electron touches a quark’s charge, and neutrino experiments measure where an antineutrino changes a quark’s flavor.

From Scientific American ● Mar. 16, 2023

Rarely, a proton in the oil will absorb an electron antineutrino to turn into a neutron while ejecting a positron—sort of the reverse of beta decay.

From Science Magazine ● Jan. 11, 2023

Figure 31.19 In β− decay, the parent nucleus emits an electron and an antineutrino.

From Textbooks ● Aug. 12, 2015

If neutrinos and antineutrinos oscillate differently, that difference could point to why matter ultimately prevailed.

From Science Daily ● Mar. 3, 2026

The combined findings suggest there may be a difference in how neutrinos and antineutrinos oscillate, indicating a possible violation of CP symmetry.

From Science Daily ● Mar. 3, 2026

Some of the surviving electron antineutrinos will slam into a proton in the scintillator, producing an energetic positron that results in a flash of light.

From Science Magazine ● Aug. 22, 2023

The physics community’s most widely accepted theory on the formation of these nuclei tells us that neutrinos and antineutrinos played a fundamental role in the creation of, in particular, helium nuclei.

From Scientific American ● Jul. 28, 2023

The neutrinos and antineutrinos, however, would not have annihilated with each other, because these particles interact with themselves and with other particles only very weakly.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

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