hygroma

noun3

1. •
   a discrete, fluid-filled sac
2. •
   Such that can form on the joints of dogs or other animals in response to repeated pressure.

   • When the hemorrhage is limited the symptoms may not become noticeable; if it is near the surface of the body a round or diffuse swelling or tumor may form, constituting a hygroma. — 1916
3. •
   Synonym of false bursa