sacrotuberous
adjective medical specialized uk/ˌseɪ.krəʊˈtʃuː.bə.rəs/ us/ˌsæk.roʊˈtuː.bɚ.əs/
骶结节的
relating to the area between the sacrum (= a bone at the base of the back) and the ischial tuberosity on the back of the lower hip bone
the sacrotuberous ligament 骶结节韧带