noun empyema The collection of pus in a cavity in the body, especially in the pleural cavity. 2
noun empyema (medicine) A collection of pus within a naturally existing anatomical cavity (as opposed to an abscess, which occurs in a newly formed cavity). 1
noun empyema a collection of pus in a body cavity, esp in the chest 0
noun empyema the accumulation of pus in a body cavity, esp. in the pleural cavity 0
