Piece of paper, metal, plastic or rubber carrying an image to be reproduced using a printing press.<br><br>A smooth, flat, relatively thin, rigid object of uniform thickness. May refer to any of the following: a sheet of metal, electroplate, a sheet of any material prepared to be inked in order to make prints, a print (especially when produced for a book), a light-sensitive sheet of glass or metal used in a photographic process, or a very shallow vessel.Also see iconograph.