meaning of commissure
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.
3. A collection of fibers connecting parts of the brain or spinal marrow; a chiasma.
4. The line of junction or cohering face of two carpels, as in the parsnip, caraway, etc.
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