poly·graph /'pä-lē-ˌgraf/ n: an instrument that records physiological pulsations; esp: lie detector
poly·graph·ic /ˌpä-lē-'gra-fik/ adj

Merriam-Webster’s Dictionary of Law. . 1996.

A lie detector; a device that monitors heart rate, breathing, and other physical aspects of a person being questioned to predict the likelihood that he or she is telling the truth, but with debatable reliability.

The Essential Law Dictionary. — Sphinx Publishing, An imprint of Sourcebooks, Inc. . 2008.

A lie detector device that tests a person's physiological response (for example, changes in blood pressure and respiration) to questionning. The test's reliability is a matter of ongoing controversy, and in most U.S. states polygraph test results are not admissible in court.
Category: Small Claims Court & Lawsuits

Nolo’s Plain-English Law Dictionary. . 2009.

An instrument used to measure physiological responses in humans when they are questioned in order to determine if their answers are truthful.

Dictionary from West's Encyclopedia of American Law. 2005.

An instrument used to measure physiological responses in humans when they are questioned in order to determine if their answers are truthful.

Short Dictionary of (mostly American) Legal Terms and Abbreviations.

   a lie detector device, from Greek for "many" (poly) "message" (graph) since numerous physiological responses are tested when questions are answered.
   See also: lie detector test

Law dictionary. . 2013.

Look at other dictionaries:

  • Polygraph — Pol y*graph, n. [Gr. ? writing much; poly s much, many + ? to write: cf. F. polygraphe.] 1. An instrument for multiplying copies of a writing; a manifold writer; a copying machine. [1913 Webster] 2. In bibliography, a collection of different… …   The Collaborative International Dictionary of English

  • Polygraph — (v. gr.), 1) Vielschreiber, Verfasser zahlreicher Werke, gewöhnlich in tadelndem Sinne; 2) s. u. Kopirmaschine 1) b) Daher Polygraphie, 1) Vielschreiberei; 2) Schrift, deren sich nicht blos eine bestimmte Sprache, sondern auch viele andere… …   Pierer's Universal-Lexikon

  • Polygraph — (griech.), Vielschreiber; auch eineeigenartig konstruierte Kopiermaschine …   Meyers Großes Konversations-Lexikon

  • Polygraph — Polygrāph (grch.), Vielschreiber; Kopiermaschine …   Kleines Konversations-Lexikon

  • Polygraph — Polygraph, ein Vielschreiber, und in diesem Sinne oft tadelnd gebraucht, im Allgemeinen aber, jeder Autor, der Viel über Vieles schreibt …   Damen Conversations Lexikon

  • polygraph — (n.) 1794, mechanical device for making multiple copies of something written or drawn, from Gk. polygraphos writing much, from polys much (see POLY (Cf. poly )) + graphos writing, from graphein to write (see GRAPHY (Cf. graphy)). Meaning instru …   Etymology dictionary

  • polygraph — ► NOUN ▪ a machine for recording changes in a person s physiological characteristics, such as pulse and breathing rates, used especially as a lie detector …   English terms dictionary

  • polygraph — [päl′i graf΄] n. [Gr polygraphos, writing much: see POLY & GRAPH] 1. an early device for reproducing writings or drawings 2. an instrument for recording simultaneously changes in blood pressure, respiration, pulse rate, etc.: see LIE DETECTOR… …   English World dictionary

  • Polygraph — This article is about the forensic instrument. For the automatic signing instrument, see Autopen. For the dual pen device that produces a simultaneous copy of an original while it is written in cursive writing, see Polygraph (duplicating device) …   Wikipedia

  • Polygraph — Ein Polygraph ist: ein Lügendetektor Polygraf, ein Beruf im Druckwesen Polygraph (Zeichnen), ein Zeichenhilfmittel Jefferson Polygraph, ein Vorläufer des Kopiergeräts das Kombinat Polygraph Werner Lamberz, ein ehemaliges Industriekombinat in… …   Deutsch Wikipedia

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