part of part of surrounds surrounds attached to attached to system acetabular part of hip bone hip joint pelvic region element acetabular rim cartilage element acetabular labrum Wikipedia:Acetabular_labrum labrum acetabuli glenoidal labrum of hip joint A ring of cartilage that surrounds the acetabulum[WP,unvetted]. Its function is to deepen the acetabulum, making it more difficult for the head of the femur to slip out of place (sublux) labrum of acetabulum SCTID:182439007 some sources treat this as fibrocartilage Cartilaginous ring that forms the entire acetabular margin[AAO:0000864]. AAO:0000864 acetabular lip cotyloid ligament acetabular rim FMA:43521 UBERON:0011958 SCTID:263366005