The greater sciatic notch is an important anatomical feature that allows nerves and blood vessels to pass from the pelvis into the legs. It is a large opening in the pelvic bone that is located on the posterior (back) side of the acetabulum, which is the socket joint where the femur bone meets the pelvis. Although there are no direct synonyms for the greater sciatic notch, it is sometimes referred to as the sciatic foramen, sciatic notch, greater or larger sciatic foramen, or pelvis sciatica foramen. These terms are used interchangeably in medical textbooks and anatomy charts to describe the same anatomical features. Understanding the various terms associated with the greater sciatic notch is important in medical education, especially when learning about conditions that affect this area, such as sciatica.