posterior horn

n.
  1. The occipital division of the lateral ventricle of the brain, extending backward into the occipital lobe.dorsal horn
  2. The posterior gray column of the spinal cord in cross section.dorsal horn
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.