[TA] a flattened ligament that passes from the fovea in the head of the femur to the borders of the acetabular notch (transverse acetabular ligament); developmentally, an artery passes to the head of the femur with the ligament, which may or may not persist into adulthood; the ligament does not contribute to the integrity of the joint nor control movements there. SYN: ligamentum capitis femoris [TA], ligamentum teres femoris, round ligament of femur.