Yang, Kyung-Chol's definitions

neutrino

(Particle Physics) noun. neutrino. Originated by Pauli, using the term 'neutron.' After discovery of 'heavy neutron' by Chadwick (1932), Enrico Fermi dubbed the term by using 'Neutrino' to distinguish from Chadwick's 'heavy neutron.'

There are three types of neutrinos, which are electron, tau, and muon.

by Yang, Kyung-Chol May 5, 2003