quasiparticle
Noun
Meaning
a quantum of energy (in a crystal lattice or other system) that has position and momentum and can in some respects be regarded as a particle
Source: WordNetSynonyms
Hypernyms
Examples
My favorite nanomaterial is carbon nanotubes and my favorite quasiparticle is the plasmon.
They are quasiparticle quantum modes of vibration of elastic structures of interacting particles.