Here are some definitions for you... neu·tri·no (n
Any of three electrically neutral subatomic particles in the lepton familyMain Entry: neu·tri·no
Inflected Form: plural-nos : an uncharged elementary particle that is believed to be massless or to have a very small mass, that has any of three forms, and that interacts only rarely with other particles
n : an elementary particle with zero charge and zero mass
Other than that I'm sorry I can't help explain it...subatomic particals is not my thing...