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Definition: the five segments of the spinal cord that give rise to the five pairs of lumbar spinal nerves [L1–L5] and constitute the lumbar part of the spinal cord, that in the adult, lies within the portion of the vertebral canal formed by the T11–L1 vertebrae.
Synonym(s): segmenta medullae spinalis lumbaria L1–L5
Examples: glitazone, GI cocktail, etc.
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