Definition of Keeler 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
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of keeler polygraph
after Leonarde Keeler †1949 American criminologist, its inventor
Seen and Heard
What made you want to look up Keeler polygraph? Please tell us where you read or heard it (including the quote, if possible).