Commissure /(? [or] ?; 134-6)/

Com·mis·sure

Commissure

n.
  1. A joint, seam, or closure; the place where two bodies, or parts of a body, meet and unite; an interstice, cleft, or juncture.
  2. The point of union between two parts, as the angles of the lips or eyelids, the mandibles of a bird, etc. (Anat. & Zool.)
  3. The line of junction or cohering face of two carpels, as in the parsnip, caraway, etc. (Bot.)