Empyema

(em-pie’-mah) [£?», in; nvov, pus]. Pus in a cavity, especially in the pleural cavity. E. nec e it at is, an empyema in which the pus burrows between the intercostal spaces and appears as a subcutaneous tumor. E., Pulsating, one which transmits the pulsations of the heart to the chest -wall. 258