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Meaning of quasiparticle

qua•si•par•ti•cle

Pronunciation: (kwā"zī-pär'ti-kul, kwā"sī-, kwä"sē, -zē-), [key]
— n. Physics.
  1. an entity, as an exciton or phonon, that interacts with elementary particles, but does not exist as a free particle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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