Com'mis-sūre, n.

(95), n. [Fr. commissure, Lat. commissura, a joining together. See infra.]

1. (Arch.) The application of the surface of one stone to that of another. Gwilt.
2. A joint, seam, or closure; the place where two bodies, or parts of a body, meet and unite; an interstice or cleft between particles or parts.
3. (Anat.) (a.) The point of union between two parts, as the angles of the lips, eyes, &c. (b.) A collection of transverse fibers connecting parts on each side of the brain and spinal marrow.
4. (Bot.) The line of junction of two carpels, as the parsnip, caraway, &c. Gray.