posterior cord of brachial plexus

n.
  1. A fasciculus formed by the posterior divisions of the upper, middle, and lower trunks and giving rise to the subscapular, thoracodorsal, axillary, and radial nerves.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.