flatbed

Concise Oxford English Dictionary © 2008 Oxford University Press:
flatbed/ˈflatbed/

▶noun

• 1 a long flat area or structure.

• 2 [as modifier] denoting a vehicle with a flat load-carrying area.

• 3 [as modifier] denoting a letterpress printing machine in which the forme is carried on a horizontal surface.

• 4 Computing a scanner, plotter, or other device which keeps paper flat during use.