Main Entry: ap·pa·ra·tus

Pronunciation: \ˌa-pə-ˈra-təs, -ˈrā-\

Function: noun

Inflected Form(s): plural ap·pa·ra·tus·es or ap·pa·ra·tus

Etymology: Latin, from apparare to prepare, from ad- + parare to prepare — more at pare

Date: circa 1628

1 a : a set of materials or equipment designed for a particular use b : a group of anatomical or cytological parts functioning together <mitotic apparatus> c : an instrument or appliance designed for a specific operation
2 : the functional processes by means of which a systematized activity is carried out <the apparatus of society>: as a : the machinery of government b : the organization of a political party or an underground movement