gallbladder or gall bladder
n.
A small, pear-shaped muscular sac, located under the right lobe of the liver, in which bile secreted by the liver is stored until needed by the body for digestion. Also called cholecyst, cholecystis.
A small, muscular sac located under the liver. Bile is stored in the gallbladder until it is needed by the small intestine for digestion. (See digestive system.)