commissure
noun
[ ˈkɒmɪsjʊə ]
• the joint between two bones.
• a band of nerve tissue connecting the hemispheres of the brain, the two sides of the spinal cord, etc.
• the line where the upper and lower lips or eyelids meet.
Origin:
late Middle English: from Latin commissura ‘junction’, from committere ‘join’ (see commit).
