bladder
noun
[ ˈbladə ]
• a 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"
• an inflated or hollow flexible bag or chamber.
• "a dried bladder of seaweed"
Origin:
Old English blǣdre, of Germanic origin; related to Dutch blaar and German Blatter, also to blow1.
