It depends what it's used for... If it's covering poor quality wood - it's called a veneer. If it's to level a piece of furniture - it's called a shim.
Plank Thin, lightweight wood is balsa.
A flat piece of wood is called a board.
A thin piece of wood?
A thin piece of wood is called a "slat."
The thin piece of wood used to cover a roof is called ply board or deck board. Plyboard is a sheet material manufactured from thin layers or plies of wood veneer that are glued together.
A thick piece of wood is called a plank. It is a long, flat piece of wood that is often used in construction or woodworking projects.
A pane of glass is a thin, flat piece of glass.
A shingle is a thin piece of wood that covers the roof to provide protection against the elements. Shingles can also be made of other materials such as asphalt, metal, or slate. They are arranged in overlapping rows to create a waterproof barrier for the building.
maybe I think it's "slice"
A plank or a board.
A hand planer is used to remove only a few fractions of a millimeter of wood from a piece of lumber (wood) to reveal a smooth surface. The plane consists of a sharp blade held in a flat based carrier designed to give a flat, smooth contact with the work piece.
The piece of glass used with a microscope is called a microscope slide. It is a thin, flat, rectangular piece of glass on which specimens for examination are placed.