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polygraph

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(päl′i graf′)

noun

an early device for reproducing writings or drawings
an instrument for recording simultaneously changes in blood pressure, respiration, pulse rate, etc.

Origin: Gr polygraphos, writing much: see poly- & -graph

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polygraphic adjective

See polygraph in American Heritage Dictionary 4

noun

An instrument that simultaneously records changes in physiological processes such as heartbeat, blood pressure, and respiration, often used as a lie detector.

transitive verb pol·y·graphed, pol·y·graph·ing, pol·y·graphs

To test (a criminal suspect, for example) with a polygraph.

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