probator

Noun

 * 1) An examiner; an approver.
 * 2)  One who, when indicted for crime, confessed it and accused his accomplices in order to obtain pardon.
 * 1)  One who, when indicted for crime, confessed it and accused his accomplices in order to obtain pardon.

Etymology 1
From.

Noun

 * 1) approver
 * 2) examiner

Etymology
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Adjective

 * 1) probationary