quasiparticle


qua·si·par·ti·cle

noun \ˌkwā-ˌzī-ˈpär-ti-kəl, -ˌsī-, ˌkwä-zē-, -sē-\

Definition of QUASIPARTICLE

:  a composite entity (as a vibration in a solid) that is analogous in its behavior to a single particle

First Known Use of QUASIPARTICLE

1957

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