polygraph

noun

device or procedure that attempts to infer lying by measuring physiological indicators

Pronunciation: /ˈpɒliɡɹæf/ / /ˈpɒliɡɹɑːf/

Etymology: From poly- + -graph.

A device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being posed to a subject, in an attempt to detect deception.
“It used to be just a plain office with a chair and some instruments on a table. Then they got the new, fancy polygraph system.”
A mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.
A collection of different works, either by one or several authors.
A group of letters that represent a single phoneme.
Any group of letters treated as a single item.
“A polygraph consists of an unspecified number of adjacent letters. A polygraph need not be recognisable as a word in a language but if we are attempting to decipher a message which is expected to be in English and we find the heptagraph MEETING it is much more promising than if we find a heptagraph such as DKRPIGX.”
An author who writes on many subjects.
A multidimensional directed graph.

Etymology: From poly- + -graph.

To administer a polygraph test to.
“The FBI polygraphed the suspect but learned nothing because they already knew he was lying.”