polygraph
English
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/1804_Jeffersons-Polygraph-Monticello_Cville_VA.jpg/220px-1804_Jeffersons-Polygraph-Monticello_Cville_VA.jpg)
Etymology
poly- + -graph (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
Pronunciation
- Rhymes: -ɑːf
Noun
polygraph (plural polygraphs)
- 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 asked to a subject, in an attempt to detect lies.
- Synonym: lie detector
- (dated) A mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.
- Synonyms: manifold writer, autopen
- (archaic) A collection of different works, either by one or several authors.
- (linguistics) A group of letters that represent a single phoneme.
- Any group of letters treated as a single item.
- 2002, Robert Churchhouse, Codes and Ciphers: Julius Caesar, the Enigma, and the Internet (page 3)
- 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.
- 2002, Robert Churchhouse, Codes and Ciphers: Julius Caesar, the Enigma, and the Internet (page 3)
Translations
device to discern if a subject is lying
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See also
Verb
polygraph (third-person singular simple present polygraphs, present participle polygraphing, simple past and past participle polygraphed)
- (transitive) To administer a polygraph test to.
- The FBI polygraphed the suspect but learned nothing because they already knew he was lying.