posterior triangle

posterior triangle (plural posterior triangles)

1. (anatomy) A triangular region that is a landmark in the neck, has its apex above at the occipital bone, and is bounded in front by the sternocleidomastoid muscle, behind by the anterior margin of the trapezius, and inferiorly by the middle third of the clavicle.

   Meronyms: occipital triangle, supraclavicular triangle

• anterior triangle

• “posterior triangle”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.