Probator
Pronunciation : Pro*ba"tor n.
Etymology : [L.]
Definition : 1. An examiner; an approver. Maydman.
2. (O. Eng. Law)
Defn: One who, when indicted for crime, confessed it, and accused others, his accomplices, in order to obtain pardon; a state's evidence.
Source : Webster's Unabridged Dictionary, 1913