Meaning of lumbar plexus

lum'bar plex'us

Pronunciation: [key]
— Anat. Anat.
  1. a network of nerves originating in the spinal nerves of the midback region and innervating the pelvic area, the front of the legs, and part of the feet.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.