Origin of sarosClassical Greek ; from Akkadian sh?r ; from Sumerian shar, multitude, large number
Origin of sarosMedieval Greek, from a misinterpretation of Greek saros, Babylonian astronomical cycle of 3,600 years, from Akkadian šar, šaru, the number 3,600, from Sumerian šár.
(plural saroses or saroi)
- (history, Babylon) A period of 3600 years.
- (astronomy) A period of 223 synodic months (approximately 18 years 11 days 8 hours), after which the relative positions of the earth, sun and moon recur, used to predict eclipses.
From Ancient Greek, from Akkadian.
The modern astronomical usage is attributed to Edmond Halley, who erroneously interpreted the Babylonian word as a period of 18.5 years.