(n)one of four or five pairs of arteries that originate in the abdominal aorta and supply the lumbar vertebrae and the back muscles and abdominal wall, Syn.arteria lumbalis
(n)removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes, Syn.spinal puncture, spinal tap
{ } a. [ L. lumbus loin. See Loin. ] (Anat.) Of, pertaining to, or near, the loins; as, the lumbar arteries. [ 1913 Webster ]
Lumbar region (Anat.), the region of the loin; specifically, a region between the hypochondriac and iliac regions, and outside of the umbilical region. [ 1913 Webster ]