Retroactive
Defined in 3 dictionaries — Cyclopedic (1922), Bouvier (1914), Black's (1910)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The same as "retrospective" (g. V.)
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
See Retrospective.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Has the same meaning as "retrospective," (q. vt)