Word Study
lumbar
CIDE DICTIONARY
lumbar, a. [L. lumbus loin. See Loin.].
Of, pertaining to, or near, the loins; as, the lumbar arteries. [1913 Webster]
OXFORD DICTIONARY
lumbar, adj. Anat. relating to the loin, esp. the lower back area.
Idiom
lumbar puncture the withdrawal of spinal fluid from the lower back with a hollow needle, usu. for diagnosis.
Etymology
med.L lumbaris f. L lumbus loin
ROGET THESAURUS
lumbar
Rear
N rear, back, posteriority, rear rank, rear guard, background, hinterland, occiput, nape, chine, heels, tail, rump, croup, buttock, posteriors, backside scut, breech, dorsum, loin, dorsal region, lumbar region, hind quarters, aitchbone, natch, natch bone, stern, poop, afterpart, heelpiece, crupper, wake, train, reverse, other side of the shield, back, rear, hind, hinder, hindmost, hindermost, postern, posterior, dorsal, after, caudal, lumbar, mizzen, tergal, behind, in the rear, in the background, behind one's back, at the heels of, at the tail of, at the back of, back to back, after, aft, abaft, astern, sternmost, aback, rearward, ogni medaglia ha il suo rovescio, the other side of the coin.For further exploring for "lumbar" in Webster Dictionary Online