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lum'bar punc'ture




Med.puncture into the arachnoid membrane of the spinal cord, in the lumbar region, and withdrawal of spinal fluid, performed for diagnosis of the fluid, injection of dye for imaging, or administration of anesthesia or medication. Also called spinal tap.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

lumbar plexuslumber
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