Word Study
retrim |
retriment |
retro |
retro rocket |
retro- |
retroact
| retroaction
| retroactive
| retroactively
| retrobulbar neuritis
| retrocede
retroact
CIDE DICTIONARY
retroact, v. i. [Pref. retro- + act.].
To act backward, or in return; to act in opposition; to be retrospective. [1913 Webster]
OXFORD DICTIONARY
retroact, v.intr.
1 operate in a backward direction.
2 have a retrospective effect.
3 react.
1 operate in a backward direction.
2 have a retrospective effect.
3 react.
Derivative
retroaction n.
For further exploring for "retroact" in Webster Dictionary Online
