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Noun: retroaction  ,re-trow'ak-shun
  1. Action returned, or action backward
     
  2. Operation on something past or preceding

Derived forms: retroactions

Nearest

retribution
retributive
retributory
retrievable
retrieval
retrieve
retriever
retro
retro-
retroact
retroaction
retroactive
retroactively
retrobulbar neuritis
retrocede
retrocession
retrochoir
retrodiction
retrofit
retroflection
retroflex