LUMBAR

adj. of the loin or loins, pertaining to the part of the body below the ribs and above the hipbones (in humans or quadruped animals)

n. artery or vein or vertebra situated in the lumbar region

In anatomy, lumbar is an adjective that means of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum (pelvis). The five vertebrae in the lumbar region of the back are the largest and strongest in the movable part of the spinal column, and can be distinguished by the absence of a foramen in the transverse process, and by the absence of facets on the sides of the body. In most mammals, the lumbar region of the spine curves outward; this is called lordosis.
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Lumbar /lum·bar/ pertaining to the loins. lum·bar adj. Of, near, or situated in the part of the back and sides between the lowest ribs and the [more]Lumbar - Community and Resources

Adjective
1. of or relating to or near the part of the back between the ribs and the hipbones; "lumbar vertebrae"
(pertainym) loin, lumbus

adj. lumbar, of the loin or loins, pertaining to the part of the body below the ribs and above the hipbones (in humans or quadruped animals)