polygrapher
/ˈpɑliˌɡræfər/
noun
- A person who operates a lie detector (polygraph) machine, especially as a professional.
- The company hired a private polygrapher to screen job applicants for sensitive positions.
- She trained for two years to become a certified polygrapher for the police department.
- The polygrapher asked the suspect a series of control questions before the real test began.
Synonyms