What does the word bladder mean?

Usage examples for bladder

  1. Higher up, it's no good, the arm is there to ward it off; but here, why there are a lot of very necessary organs; there's the bladder, for instance; now if you are lucky enough to hit that, and if it should happen to be full, why it would be a case of peritonitis. – Renée Mauperin by Edmond de Goncourt and Jules de Goncourt