lie detector
nounEtymology From lie + detector. First use appears c. 1909. See cite below.
1
Informal A device designed to detect or indicate when a person is lying by measuring and recording several physiological variables.
- It is a lie detector; with its aid one can plumb the bottomless pits of a chap's subconscious mind, and fathom all the mysteries of his subliminal ego.1909, Charles Edmonds Walk, The Yellow Circle, page 69:
- Related terms
- truth serum