acetabular notch acetabular notch the acetabular notch is a deep notch in the acetabulum of the hip bone. the acetabular notch is continuous with a circular non-articular depression, the acetabular fossa, at the bottom of the cavity: this depression is perforated by numerous apertures, and lodges a mass of fat. acetabular notchright hip bone. external surface (acetabular notch visible near center, inside blue line).detailsidentifierslatinincisura acetabulita98a02.5.01.005ta21311fma16944anatomical terms of bone the notch is converted into a foramen by the transverse acetabular ligament; through the foramen nutrient vessels and nerves enter the joint; the margins of the notch serve for the attachment of the ligament of the head of the femur.