transcription, транскрипция: [ -ˈak-tiv ]
adjective
Etymology: French rétroactif, from Latin retroactus, past participle of retroagere to drive back, reverse, from retro- + agere to drive — more at agent
Date: 1611
: extending in scope or effect to a prior time or to conditions that existed or originated in the past ; especially : made effective as of a date prior to enactment, promulgation, or imposition
retroactive tax
• ret·ro·ac·tive·ly adverb
• ret·ro·ac·tiv·i·ty -ˌak-ˈti-və-tē noun