lum·bo·sa·cral /ˌlʌmboˈsækrəl, ˈse-/
  lum·bo·sa·cral /ˌləmboˈsækrəl, ˈsekrəl/ 形容詞
  腰胝的,腰胝骨的
  Lum·bo·sa·cral n.  Anat. Of or pertaining to the loins and sacrum; as, the lumbosacral nerve, a branch of one of the lumber nerves which passes over the sacrum.
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  lumbosacral
       adj : of or relating to or near the small of the back and the back
             part of the pelvis between the hips