Main Entry: lumbar vein Function: noun : any vein of the four pairs collecting blood from the muscles and integument of the loins, the walls of the abdomen, and adjacentparts and emptying into the dorsal part of the inferior vena cava —see ASCENDING LUMBAR VEIN
lumbar veinn. 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.
