(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
{ } 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 ]