Main Entry: qua·si·par·ti·cle

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

Function: noun

Date: 1957

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