Hindi polygraph का अर्थ हिंदी में

• पोलीग्राफ

English polygraph meaning in English  •  polygraph का अर्थ अंग्रेजी में

Noun

• An instrument for multiplying copies of a writing; a manifold writer; a copying machine.
• In bibliography, a collection of different works, either by one or several authors.
• An instrument for detecting deceptive statements by a subject, by measuring several physiological states of the subject, such as pulse, heartbeat, and sweating. The instrument records these parameters on a strip of paper while the subject is asked questi