You searched for: “quasi particle
quasi particle
1. A quantum of energy (in a crystal lattice or other system) that has position and momentum and which can in some respects be regarded as a particle.
2. An entity; such as, an exciton or phonon, that interacts with elementary particles, but does not exist as a free particle.
This entry is located in the following units: part-, parti- (page 4) quasi- (page 1)