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Definition of Lumbar vertebrae

Lumbar vertebrae: The five vertebrae situated between the thoracic vertebrae and the sacral vertebrae in the spinal column. The lumbar vertebrae are represented by the symbols L1 through L5.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=8769
Last Editorial Review: 3/19/2012

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