bursa

 
Pronunciation: /ˈbəːsə/

noun (plural bursae /-siː/ or bursas)

Anatomy
  • a fluid-filled sac or sac-like cavity, especially one countering friction at a joint.

Derivatives

bursal

adjective

Origin:

early 19th century: from medieval Latin, 'bag, purse', from Greek bursa 'leather'