What is the literal meaning of polygraph?

The Polygraph (Lie Detector) is a scientific instrument capable of simultaneously recording changes in several physiological variables while the subject is asked a series of questions pertaining to a specific issue under investigation. ... The literal meaning of the word "polygraph" is "many writings" (Polys (Gr.)

What is a good sentence for polygraph?

Examples of polygraph in a Sentence

They hooked him up to the polygraph and began the test. She was asked to take a polygraph. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polygraph.