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noun
1historical A person who uses, studies, or invents a code or cipher. See polygraphy . rare.
2historical An instrument for making multiple copies of a document, etc.; = "polygraph". rare.
3A writer of many works; = "polygraph".
4A person who uses a lie detector or polygraph.
Origin
Late 16th century; earliest use found in John Harvey (bap. 1564, d. 1592), astrologer. From poly- + -grapher.
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