Akademik

Lumbar
Referring to the 5 lumbar vertebrae which are situated below the thoracic vertebrae and above the sacral vertebrae in the spinal column. The 5 lumbar vertebrae are represented by the symbols L1 through L5. There are correspondingly 5 lumbar nerves.
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Relating to the loins, or the part of the back and sides between the ribs and the pelvis. [L. lumbus, a loin]

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lum·bar 'ləm-bər, -.bär adj
1) of, relating to, or constituting the loins or the vertebrae between the thoracic vertebrae and sacrum <the \lumbar region>
2) of, relating to, or being the abdominal region lying on either side of the umbilical region and above the corresponding iliac region

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adj.
relating to the loin.

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lum·bar (lumґbər) (-bahr) pertaining to the loins, the parts of the sides of the back between the thorax and the pelvis.

Medical dictionary. 2011.