- an instrument for receiving and recording simultaneously tracings of variations in certain body activities.
- a test using such an instrument to determine if a person is telling the truth.
- lie detector.
- an apparatus for producing copies of a drawing or writing.
- a prolific or versatile author.
- to test (a person) with a polygraph.
- an instrument for the simultaneous electrical or mechanical recording of several involuntary physiological activities, including blood pressure, skin resistivity, pulse rate, respiration, and sweating, used esp as a would-be lie detector
- a device for producing copies of written, printed, or drawn matter
