"Perjury The act or an instance of a person’s deliberately making material false or misleading statements while under oath. – Also termed false swearing; false oath; (archaically forswearing." Garner, Bryan A. (1999). Black's Law Dictionary (7th ed.). St. Paul MN: West Group. p. 1160.
3 Inst167. This passage is quoted by Smith, J. C, and Hogan, Brian, Criminal Law (Sweet & Maxwell, 1965) (2nd Edition), p. 506.