Neutrino
Astrophysics
A lepton with no electric charge. Neutrinos participate only in weak and gravitational interactions and are therefore very difficult to detect. There are three known types of neutrinos, all of which have very little mass.
- — The Universe Adventure Glossary retrieved 2014-05-20
Nuclear Physics
An electrically neutral particle with negligible mass. It is produced in many nuclear reactions such as in beta decay.
- — Glossary of Nuclear Science Terms retrieved 2014-05-20