"polygraph" is a correct and usable word in written English.
You can use it to refer to a testing device that records physical responses to questions in order to detect lies. For example: After the robbery, the police used a polygraph to see if any of the suspects were lying.
From October around 1,000 sex offenders released from prison on licence in England and Wales but deemed to be at high risk of reoffending will be required to undergo polygraph tests.
He revealed that half the officers in a key unit failed a polygraph test last year.
He failed a polygraph, though he swears he didn't lie.
The idea that lying produces physical symptoms found its modern expression in America in the early 20th century, with the invention of the polygraph, the "lie detector" so beloved of spy films and pulp detective novels.Polygraphs are much used in the land of their invention, but Britain has traditionally been rather disdainful.
In a 2010-11 pilot study offenders who took polygraph tests made more than twice as many "clinically significant disclosures"–information that could prompt changes in the way they are managed as those that did not.
In one week, in 1966, he was given polygraph tests for 28½ hours.
After conducting 104 interrogations of DAS officials and after dozens of polygraph tests, we have found no evidence to support the theory that this list ever existed.
Now the government seems to be growing similarly keen.In May a small number of probation officers began training as polygraph examiners.
He at once told Mr Smith of this, but her handler apparently took no notice; according to the indictment, he subsequently made 19 reports to his FBI superiors saying that Ms Leung was a reliable source (which he believed, say his lawyers, even though she refused to take a polygraph test).
He was replaced by Baltazar Gómez (pictured above, left), a respected officer who had passed a polygraph test.
Gen. Douglas M. Stone, commander of the U.S. detention facilities in Iraq, who said that the courses were led by moderate Muslim clerics and that detainees who promised to change after undergoing the program were given polygraph tests in an effort to gauge their sincerity.
