pol·y·graph (p l  -gr f )n. An instrument that simultaneously records changes in physiological processes such as heartbeat, blood pressure, and respiration, often used as a lie detector. tr.v. pol·y·graphed, pol·y·graph·ing, pol·y·graphs To test (a criminal suspect, for example) with a polygraph. po·lyg ra·pher (p -l gr-fr), po·lygra·phist (-fst) n.pol y·graphic adj. |
polygraph
Noun
an instrument for recording pulse rate and perspiration, often used as a lie detector [Greek polugraphos writing copiously]
polygraph
a lie detecting device. — polygrapher, polygraphist, n. — polygraphic, adj.
See also: Lies and Lying
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | polygraph - a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration) lie detector - a polygraph that records bodily changes sometimes associated with lying medical instrument - instrument used in the practice of medicine |
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