Keeler polygraph

Kee·​ler polygraph | \ "- \

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

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

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!

History and Etymology for Keeler polygraph

after Leonarde Keeler †1949 American criminologist, its inventor

Keep scrolling for more

Learn More about Keeler polygraph

Statistics for Keeler polygraph

Cite this Entry

“Keeler polygraph.” Dictionary, Merriam-Webster, Accessed 17 Feb. 2020.

Comments on Keeler polygraph

What made you want to look up Keeler polygraph? Please tell us where you read or heard it (including the quote, if possible).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!