Complex sentence: Plywood is a sheet material manufactured from thin layers or "plies" of wood veneer made up of thin layers of wood veneer, called lamins that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another.
Split into simpler sentences: Plywood is a sheet material manufactured from thin layers or "plies" of wood veneer made up of thin layers of wood veneer, called lamins. That are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another.