What is Writ Of Revivor?

Legal Definition
In English practice. Where it became necessary to revive a Judgment, by lapse of time or change by death, etc., of the parties entitled or liable to execution, the party alleging himself to be entitled to execution might sue out a writ of revivor in the form given in the act or apply to the court for leave to enter a suggestion upon the roll that it appeared that he was entitled to have and issue execution of the judgment, such leave to be granted by the court or a judge upon a rule to show cause or a summons, to be served according to the then present practice. C. In P. Act, 1852, ยง 129.
-- Black's Law Dictionary