saros Meaning, Definition & Usage

Sa"ros noun
Etymology
NL., fr. Gr.
Definitions
  1. (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. A length of time (6535.82 days, or 18 years 11.32 days, assuming 4 leap years in that interval), after which the eclipses of the sun repeat their pattern, but are shifted 120° west..

Webster 1913