A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as "bursitis." When the bursa is infected with bacteria, the condition is called septic bursitis.
BURSITIS, SEPTIC
Meaning of BURSITIS, SEPTIC in English
English dictionary of medicine. Английский словарь медицины. 2012