Commissure

1. n. The line of junction or cohering face of two carpels, as in the parsnip, caraway, etc.
2. n. A joint, seam, or closure; the place where two bodies, or parts of a body, meet and unite; an interstice, cleft, or juncture.
3. n. The point of union between two parts, as the angles of the lips or eyelids, the mandibles of a bird, etc.
4. n. A collection of fibers connecting parts of the brain or spinal marrow; a chiasma.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.