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Retrieve
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Oxford Reference Dictionary

v.intr. 1 operate in a backward direction. 2 have a retrospective effect. 3 react. Derivatives: retroaction n.

Webster's 1913 Dictionary

Retroact Re`tro*act", v. i. [Pref. retro- + act.] To act backward, or in return; to act in opposition; to be retrospective.





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