The physics term flavor is used for the individual types of some
classes of subatomic particles. The standard model includes
the six known quark flavors, termed up, down, strange,
top, bottom, and charm, and the six known lepton flavors,
three of the lepton flavors being the electron, the muon,
and the tau, and the other three being the three neutrino
types, electron neutrino, muon neutrino, and tau neutrino.