A pear-shaped organ that stores bile from the liver, until the body needs it for the digestion and absorption of fats in the duodenum.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "gall bladder" in a sentence
"It is of an oblong form, and appears to be for the purpose of containing the bile, until the proper time for it to be thrown into the stomach: -- the bile is conveyed from the gall bladder into the first portion of the small intestines, called duodenum, and from thence into the stomach."