Common Dovetail Joint
In Joinery, a common dovetail joint is the most efficient for joining two boards that meet at a right angle. The edges of each board are cut into a series of alternate projections and indentations, which fit into each other, and which by the bevel of their sides prevent the boards from drawing apart.
GalleriesCarpentry and Woodworking
John H. Finley ed. Nelson's Perpetual Loose-Leaf Encyclopaedia (vol. 7) (New York, NY: Thomas Nelson and Sons, 1917) 13