commissure

commissure is a Noun

Definition:

[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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