Polygraph

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Polygraph

(n.) An instrument for multiplying copies of a writing; a manifold writer; a copying machine.
(n.) In bibliography, a collection of different works, either by one or several authors.
(n.) An instrument for detecting deceptive statements by a subject, by measuring several physiological states of the subject, such as pulse, heartbeat, and sweating. The instrument records these parameters on a strip of paper while the subject is asked questions designed to elicit emotional responses when the subject tries to deceive the interrogator. Also called lie detector