*jointer*

n. 1. One who, or that which, joints. [ 1913 Webster ]

2. A plane for smoothing the surfaces of pieces which are to be accurately joined; especially: (a) The longest plane used by a joiner. (b) (Coopering) A long stationary plane, for planing the edges of barrel staves. [ 1913 Webster ]

3. (Masonry) (a) A bent piece of iron inserted to strengthen the joints of a wall. (b) A tool for pointing the joints in brickwork. [ 1913 Webster ]