Polygraph (noun)

A device used to measure and record various physiological responses to questions.

Origin:

Derived from greek words 'poly-' meaning 'many' and 'graph' meaning 'writing or recording'.

Examples:

1. The polyggraph is often used by law enforcement agencies to determine if a suspect is lying.
2. The results of the polyggraph test were inconclusive and the suspect was set free.
3. The polyggraph machine recorded changes in the suspect's heart rate, blood pressure, and sweat gland activity.
4. The polygraph examiner was trained in the interpretation of physiological responses.
5. The use of the polygraph as evidence in court is often disputed due to its reliability.