Polygraph

n. lie detector, machine that can detect and record physiological changes that occur when a person is not telling the truth

n. machine for duplicating, copying machine; productive writer, prolific writer

A polygraph (commonly referred to as a lie detector) is an instrument that measures and records several physiological responses such as blood pressure, pulse, respiration and skin conductivity while the subject is asked and answers a series of questions. The polygraph measures physiological changes caused by the Sympathetic Nervous System during questioning. Within the Federal Government, a polygraph examination is also referred to as a psychophysiological detection of deception (PDD) examination.
See more at Wikipedia.org...

Noun
1. a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration)
(hypernym) medical instrument
(hyponym) lie detector

n. polygraph, lie detector, machine that can detect and record physiological changes that occur when a person is not telling the truth

(n.)
In bibliography, a collection of different works, either by one or several authors.
  

(n.)
An instrument for multiplying copies of a writing; a manifold writer; a copying machine.
  

(n.)
An instrument for detecting deceptive statements by a subject, by measuring several physiological states of the subject, such as pulse, heartbeat, and sweating. The instrument records these parameters on a strip of paper while the subject is asked questions designed to elicit emotional responses when the subject tries to deceive the interrogator. Also called lie detector