polygraph > define

noun

• A medical instrument that records several physiological processes simultaneously (e. G., pulse rate and blood pressure and respiration and perspiration. ).

• (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.
• (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.