Etymology

octaeteris

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Today it means: Synonym of octennium: An 8-year period, particularly (historical) in Greek calendrical and astronomical calculations. Full definition →

Ancient Greek ὀκταετηρίς
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The story

  1. Ancient Greek · borrowed fromὀκταετηρίς“8-year [period]”
  2. English todayoctaeteris

Borrowed from Ancient Greek ὀκταετηρίς (oktaetērís, “8-year [period]”).

Etymology from Wiktionary, CC BY-SA 4.0.