The plywood sheet is a composite material, which simply means that it is made up of multiple layers glued together to make one large sheet. Plywood is a panel-shaped wood-based material made from several thin layers of wood (the plies or wood veneers) that are glued crosswise (90 Â° angle to each other) along the grain. This normalizes material properties such as shrinkage and swelling behavior. Plywood is formed from an odd number of veneer sheets. Plywood is also used for furniture sets, cabinets and tables. The plywood sheet is made for use in the various industries.