Definition
An antineutrino is the antimatter counterpart of a neutrino ⚛️. Neutrinos are fundamental particles that are very light and have no electric charge. Antineutrinos also have very little mass and are electrically neutral. They differ from neutrinos in their "handedness" or spin direction. They interact very weakly with matter, making them difficult to detect. Think of them as ghostly particles, always slipping through.