Definitions

1. noun

A subatomic particle that is the antiparticle of a neutrino; it has the same mass as the neutrino but opposite charge and lepton number.

“Physicists have been studying antineutrinos to better understand the behavior of subatomic particles in high-energy collisions.”

2. noun

A type of antiparticle that is produced when a neutron undergoes beta decay, typically in nuclear reactors or during supernovae explosions.

“The antineutrinos emitted during the supernova explosion were detected by a team of astronomers using sensitive telescopes.”