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.

(linguistics) A group of letters that represent a single phoneme.

Any group of letters treated as a single item.

An author who writes on many subjects.

(mathematics) A multidimensional directed graph; a computad.

(transitive) To administer a polygraph test to.