Lumbar vein

Medical Dictionary

lumbar vein n.
Any of five veins that accompany the lumbar arteries, drain the posterior body wall and lumbar vertebral venous plexuses, and terminate in the ascending lumbar vein, the inferior vena cava, or in the iliolumbar vein.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
lumbar vein

noun
veins that drain the posterior body wall and the lumbar vertebral venous plexuses 
WordNet® 3.0, © 2006 by Princeton University.
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