term used by some authors for the small metates or interfaces of bodies; or the little clefts between the particles: especially when those particles are broadish and flat, and lie contiguous to one another, like thin plates and lamellae. The word literally signifies a joining or connecting of one thing to another.

Architecture, &c., denotes the joint of two stones, or the application of the surface of the one to that of the other. See Masonry.

Among anatomists, commissure is sometimes also used for a future of the cranium or skull. See Suture.