The parietomastoid suture is a joint that connects the parietal and mastoid bones of the skull. There are several synonyms for this suture, including the parietal-mastoid suture, the mastoparietal suture, and the suture of Herring. Each of these terms refers to the same anatomical structure, which is important for understanding the cranial anatomy and its functions. The parietomastoid suture is one of the many sutures and joints in the skull that allows for movement and flexibility of the skull bones. Other important sutures include the sagittal and lambdoid sutures. By knowing these different terms, medical professionals can better describe and communicate about the anatomy of the skull.