Jugulum, also known as jugular notch, is a term used to describe the indentation between the collarbones at the base of the neck where the jugular vein is located. Although it is a specific term, there are several synonyms that can be used in its place. Terms such as thoracic inlet, sternal notch, suprasternal notch, and jugular fossa can all be used to describe the same anatomical location. These terms are often used interchangeably when referring to the jugular vein or other structures in the neck such as the trachea or esophagus. Using these synonyms can help to clarify communication between healthcare professionals and reduce confusion in clinical settings.