The common bile duct is an important structure in the body that helps transport bile from the liver to the small intestine. However, it is often referred to by different names, including choledochus, hepatoduodenal duct, and biliary duct. These various synonyms are used interchangeably by healthcare professionals and medical students to describe the same structure. Additionally, the common bile duct can be further broken down into smaller parts, such as the cystic duct or the hepatic duct, which play crucial roles in the digestive process. Understanding these synonyms and the different parts of the common bile duct is important for proper diagnosis and treatment of related medical conditions.