Definitions for gallbladder
Random House Webster's College Dictionary
or gall′ blad`der
a membranous sac attached by ducts to the liver, in which bile is stored and concentrated.
Origin of gallbladder:
gallbladder, gall bladder(noun)
a muscular sac attached to the liver that stores bile (secreted by the liver) until it is needed for digestion
U.S. National Library of Medicine
A storage reservoir for BILE secretion. Gallbladder allows the delivery of bile acids at a high concentration and in a controlled manner, via the CYSTIC DUCT to the DUODENUM, for degradation of dietary lipid.