carotid triangle

n.
  1. A space bounded by the superior belly of the omohyoid muscle, by the anterior border of the sternocleidomastoid muscle, and by the posterior belly of the digastric muscle, containing the bifurcation of the common carotid artery.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.