Naut. Short for WALL-KNOT.
1834. Marryat, P. Simple, vi. How is this to be finished off sir? inquired a sailor of the boatswain. Why, it must be with a double wall.
c. 1860. H. Stuart, Seamans Catech., 30. Make a single wall. Ibid., 56. A double wall or deck stopper-knot is made close up to the wall.
1884. Knight, Dict. Mech., Suppl., Wall and Crown. This knot should be finished with a crown.