cingulate sulcus

n.
  1. A fissure on the mesial surface of the cerebral hemisphere, bounding the upper surface of the cingulate gyrus, curving up to the superomedial margin of the hemisphere, and bordering the paracentral lobule posteriorly.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.