Definition of "lumbosacral" [lum•bo•sa•cral]

• Of or pertaining to the lumbar and sacral regions of the back; the small of the back and the back portion of the pelvis. (adjective)

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• "Today, ergonomists worry less about manual laborers' arms than about their backs, because the lower back specifically the lumbosacral junction is now understood to be the weakest link in the "body segment chain.""
• "Believe it or not, the study showed "mild degenerative disk disease," but it had no impact whatsoever on management: wear a lumbosacral support; activity to comfort."
• "First, there have been a fairly limited number of morphological studies involving the human lumbosacral cord showing loss of motor neurons after age sixty."