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Etymology edit

From Late Latin tetraeteris, from Ancient Greek τετραετηρίς (tetraetērís), from τετρα- (tetra-, four) + ἔτος (étos, year).

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Noun edit

tetraeteris (plural tetraeterides)

  1. Synonym of quadrennium: A four-year period, particularly (historical) those used in ancient Egyptian and Greek astronomical calculations.

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