empyema

em·py·ema

noun \ˌem-ˌpī-ˈē-mə\

plural em·py·ema·ta \-mət-ə\ also em·py·emas

Definition of EMPYEMA

: the presence of pus in a bodily cavity (as the pleural cavity)—called also pyothorax

—em·py·emic \-mik\ adjective