The Collaborative International Dictionary of English v.0.48:
Perjurer \Per"jur*er\, n. One who is guilty of perjury; one who perjures or forswears, in any sense. [1913 Webster] PerjuriousWordNet (r) 3.0 (2006):
perjurer n 1: a person who deliberately gives false testimony [syn: perjurer, false witness]