lie detector

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English[edit]

A medieval lie detector
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Noun[edit]

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[edit]

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See also[edit]

chart recorder often used with a
lie detector