lie detector

EnglishEdit

 
A medieval lie detector
 
chart recorder often used with a lie detector

NounEdit

lie detector (plural lie detectors)

  1. (informal) A polygraph, a device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being asked to a subject, in an attempt to detect lies.
    Synonyms: pathometer, polygraph

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