lumbosacral
adjective medical specialized uk/ˌlʌm.bəʊˈseɪ.krəl/ us/ˌlʌm.boʊˈseɪ.krəl/
腰骶的
relating to the lower back and sacrum (= the large triangular bone at the bottom of the spine)
lumbosacral pain 腰尻痛
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