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lum·bo·sa·cral .ləm-bō-'sak-rəl, -'sā-krəl adj of, relating to, or being the lumbar and sacral regions or parts <the \lumbosacral spinal cord>
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adj.
relating to part of the spine composed of the lumbar vertebrae and the sacrum.
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lum·bo·sa·cral (lum″bo-saґkrəl) pertaining to the lumbar vertebrae and sacrum, or to the lumbar and sacral regions.Medical dictionary. 2011.