The Collaborative International Dictionary
Polygraphical
Polygraphic \Pol`y*graph"ic\, Polygraphical \Pol`y*graph"ic*al\, a. [Cf. F. polygraphique.] Pertaining to, or employed in, polygraphy; as, a polygraphic instrument.
2. Done with a polygraph; as, a polygraphic copy.
Wiktionary
polygraphical
a. polygraphic.
Usage examples of "polygraphical".
Others again, are polygraphical in their nature, as Encyclopedias, magazines, etc.