English

A medieval lie detector

Noun

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

• polygraph

Translations

See also

• truth serum

chart recorder often used with a
lie detector