adv.after the fact

"he will get paid retroactively"

Emotional learning selectively and retroactively strengthens memories for related events
Apparatus and method for retroactively installing sensors on marine elements
Caudate Nucleus Stimulation Retroactively Impairs Complex Maze Learning in the Rat
Arginine vasopressin enhances memory retroactively in chicks.
Trail Mountain Coal Co. v. Utah Division of State Lands & Forestry: Can States Retroactively Alter Their Own Contractual Obligations?
Does the New York Arbitration Convention of 1958 apply retroactively: decision of the House of Lords in Government of Kuwait v. Sir...
Transformative Answers: One Way to Resist a Question's Constraints
The effect of precision, delay, and schedule of knowledge of results on performance.
Japan's Financial Structure since the 1980s - in View of the Flow of Funds Accounts
On the Principle of Favorable Retroactivity and the Problems in Its Application