feather joint[′feth·ər ‚jȯint]
A joint made by cutting a mating groove in each of the pieces to be joined and inserting a feather in the opening formed when the pieces are butted together. Also known as ploughed-and-tongued joint.
One of a series of joints in a fault zone formed by shear and tension. Also known as pinnate joint.
A joint between two closely fitting boards which have been squared and butted against each other; a groove is cut along the length of each board in which a common tongue is fitted.