artefact, artifact - a man-made object taken as a whole

blackboard, chalkboard - sheet of slate; for writing with chalk

blank - a piece of material ready to be made into something

board - a flat piece of material designed for a special purpose; "he nailed boards across the windows"

plastic film, film - a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things

laminate - a sheet of material made by bonding two or more sheets or layers

layer, bed - single thickness of usually some homogeneous substance; "slices of hard-boiled egg on a bed of spinach"

membrane - a thin pliable sheet of material

panel - sheet that forms a distinct (usually flat) section or component of something

plate - a sheet of metal or wood or glass or plastic

photographic plate, plate - a flat sheet of metal or glass on which a photographic image can be recorded

plate glass, sheet glass - glass formed into large thin sheets

sheet metal - sheet of metal formed into a thin plate

wallboard - thin sheet used to cover walls or partitions