bursa
noun/ˈbɜːsə/
/ˈbɜːrsə/
(plural bursae
(anatomy)/ˈbɜːsiː/
/ˈbɜːrsiː/
, bursas)- a part inside the body like a bag, which is filled with liquid, especially around a joint so that it can work smoothlyWord Originearly 19th cent.: from medieval Latin, ‘bag, purse’, from Greek bursa ‘leather’.
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bursa