Noun

1. 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.
2. An mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.

Synonyms

Verb

1. To administer a polygraph test.

   The FBI polygraphed the suspect but learned nothing because they already knew he was lying.