Keeler polygraph


Kee·​ler polygraph
: an instrument for making a graphic record of the changes in blood pressure and pulse and respiration rate of someone being questioned under or as if under suspicion of guilt

called also lie detector

Word History


after Leonarde Keeler †1949 American criminologist, its inventor

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Dictionary Entries Near Keeler polygraph

Cite this Entry

“Keeler polygraph.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2024.

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