Wiktionary
biliary sludge
n. (context medicine English) Particulate matter that forms from bile and substances such as cholesterol crystals and calcium bilirubinate.
Wikipedia
Biliary sludge
Alternative names
Biliary sludge Gallbladder sludge
Microcrystalline disease
Biliary sediment
Thick bile
Biliary sand
Biliary sludge refers to a viscous mixture of small particles derived from bile. These sediments consist of cholesterol crystals, calcium salts, calcium bilirubinate, mucin, and other materials.