\Cop"per*plate`\ (k[o^]p"p[~e]r*pl[=a]t`), n.
(a) A plate of polished copper on which a design or writing
    is engraved.
(b) An impression on paper taken from such a plate.
Note: In printing from a copper- or steel plate the lines are
      filled with ink, the surface of the plate is wiped
      clean, the paper laid upon it, and the impression taken
      by pressing it under the roller of a plate press.
{Copperplate press}. See {Plate press}, under {Plate}.