bladder

 
Pronunciation: /ˈbladə/

noun

  • 1a muscular membranous sac in the abdomen which receives urine from the kidneys and stores it for excretion: patients were asked to empty their bladders before going to bed
  • 2an inflated or hollow flexible bag or chamber: a dried bladder of seaweed an air bladder in the arch of the shoe

Origin:

Old English blǣdre, of Germanic origin; related to Dutch blaar and German Blatter, also to blow1