polygraph ( synonym found)
Definition of 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.
°To administer a polygraph test.
"The FBI polygraphed the suspect but learned nothing because they already knew he was lying."
Definition of 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.
°To administer a polygraph test.
"The FBI polygraphed the suspect but learned nothing because they already knew he was lying."
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