plywood
n. uncountablen. a strong board made by gluing several thin layers of wood together. It is very common in building and making furniture because it does not break or bend easily.
n. a structural material manufactured from thin layers or 'plies' of wood veneer glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another.
He used a sheet of plywood to fix the floor.
The construction crew boarded up the broken windows with thick plywood to protect the shop from the storm.
Engineers often specify marine-grade plywood for boat hulls because the cross-grained layers provide exceptional dimensional stability and resistance to splitting under high moisture conditions.
From ply (“sheet”) + wood.
Usually uncountable when referring to the material; can be countable when referring to specific sheets or types ('a piece of plywood', 'various plywoods').