Calcium salt bilirubin is a compound formed when calcium combines with bilirubin, a yellow pigment found in bile. Synonyms for this term include bilirubin calcium complex or calcium bilirubinate. These terms are often used interchangeably to describe the same substance. Calcium salt bilirubin is commonly formed in the gallbladder or bile ducts, leading to the formation of gallstones. Understanding the different synonyms for this compound helps in medical discussions and research related to bilirubin metabolism and the pathogenesis of gallstones. Further studies may shed light on the prevention and treatment of conditions associated with calcium salt bilirubin.