Main Entry: pneu·mo·coc·cus

Pronunciation: \ˌn(y)ü-mə-ˈkäk-əs\

Function: noun

Inflected Form(s): plural pneu·mo·coc·ci \-ˈkäk-ˌ(s)ī\

: a bacterium of the genus Streptococcus (S. pneumoniae) that causes an acute pneumonia involving one or more lobes of the lung