What is the meaning of Neutrino?

An elementary particle that is classified as a lepton, and has an extremely small but nonzero mass and no electric charge. It interacts with the surroundings only via the weak force or gravitation, making it very difficult to detect.

neutrino

neutrino

neutrino

neutrino

neutrino

neutrino

neutrino

neutrino (en elementary particle with extremely small mass and no electric charge)

neutrino

neutrino

neutrino

Source: wiktionary.org