retroactively

from WordNet (r) 3.0 (2006)
retroactively
    adv 1: after the fact; "he will get paid retroactively"
from The Collaborative International Dictionary of English v.0.48
Retroactively \Re`tro*act"ive*ly\, adv.
   In a retroactive manner.
   [1913 Webster]
antiflux / dictionary / retroactively
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