A grooving plane, plow plane, or plough plane is a plane used in woodworking to make grooves and (with some of the metal versions) small rabbets. They are traditionally used for drawer bottoms or rear walls.
References Moody, John A. (1981). American Cabinetmaker's Plane, Its Design and Development: 1700-1900. Tool Box. ISBN 978-0960654802. Rosebrook, Donald; Fisher, Dennis (2003). Wooden Plow Planes: A Celebration of the Planemakers' Art. Astragal Press. ISBN 978-1931626118.