Saros n. : 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.

Example:
Does precession of the earths rotation axis affect the Saros cycle?

Taxonomy
eclipse, Saros series, Saros cycle, Saros, partial eclipses, solar eclipses, the Saros cycle, the Moon, descending node, visibility, cycle, BCE, penumbral, total eclipse, lunar eclipse, free encyclopedia, Search, Earth.

Defination from the web:
Saros cycle is an eclipse cycle with a period of about 18 years 11 days 8 hours (approximately 6585⅓ days) that can be used to predict eclipses of the Sun and Moon. ... The name "saros" was first given to the eclipse cycle by Edmond Halley in 1691, who took it from the Suda, a ...