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plywood, structural material manufactured by gluing together thin sheets of wood, called veneers or plies, with the grain of the layers typically arranged at wide or perpendicular angles for strength. Plywood is a panel product, like particleboard and fibreboard, meaning it is produced in flat sheets from wood-based materials and adhesive. Plywood has several advantages over natural wood, especially its dimensional stability (the measure of how much a material’s dimensions change due to temperature and...