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 (ăn′tē-no͞o-trē′nō, -nyo͞o-, ăn′tī-)
n. pl. an·ti·neu·tri·nos
The antiparticle of a neutrino.


n, pl -nos
(Atomic Physics) the antiparticle of a neutrino; a particle having oppositely directed spin to a neutrino, that is, spin in the direction of its momentum


(ˌæn ti nuˈtri noʊ, -nyu-, ˌæn taɪ-)

n., pl. -nos.
the antiparticle of a neutrino, distinguished from the neutrino by its equal but opposite spin.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antineutrino - the antiparticle of a neutrino
antilepton - the antiparticle of a lepton
References in periodicals archive ?
The most highly developed Penning trap presently at hand needs still a drastic improvement and ground-breaking ideas in order to achieve the two scientific goals of the present grant application: (i), determination of the Q-value of the decay 187Re to 187Os with an accuracy of delta_m/m = 10^(-11) as required for the MARE I campaign aiming at a determination of the mass of the electron antineutrino via a very careful determination and analysis of the beta spectrum; (ii), measurement of the masses of superheavy nuclei (Z less or equal to 118) produced by hot fusion process enabling a clear assignment of the proton number to the different isotopes (and by this also the naming of the elements discovered by hot fusion) and making possible tests of state-of-the-art nuclear theories.
Other nuclear reactor studies, including an experiment at the Bugey reactor in Saint-Vulbas, France, have seen similar electron antineutrino deficits, he notes.
The ground state up and antiup quark pair completely annihilates into an electron antineutrino, [u.
Beta decay of the neutron into a proton, electron, and electron antineutrino is occasionally accompanied by the emission of a photon.
which is broken into an electron and an electron antineutrino.
Their presence is "very strong evidence" that a muon antineutrino can transform itself into an electron antineutrino through a hypothetical process that theorists call neutrino oscillation, says Fred J.
But the relevance of this measurement, which sets an upper limit of 8 electronvolts on the mass of an electron antineutrino, remains clouded by concerns that an unknown physical effect may be interfering with the experiment.