found this last night and forgot to post
http://www.etymonline.com/index.php?term=polygraph
Quote:
polygraph Look up polygraph at Dictionary.com
1794, "mechanical device for making multiple copies of something written or drawn," from Gk. polygraphos "writing much," from polys "much" (see poly-) + graphos "writing," from graphein "to write." Meaning "instrument for recording several pulsations of the body at the same time" is 1871; first used as a lie detector 1921.
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