SAROS

[Babylonian] Name for a great cycle of time. Probable origin of the Chaldee word zer, "to encompass".

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Sa″ros (?), n. [] (Astron) A Chaldean astronomical period or cycle, the length of which has been variously estimated from 3,600 years to 3,600 days, or a little short of 10 years. Brande & C.