- the period of 223 synodic months, equaling 6585.32 days or 18 years, 11.32 days (or 10.32 days if 5 leap years occur in the interval), after which eclipses repeat but are shifted 120° west.
- Gulf of, an inlet of the Aegean, N of the Gallipoli Peninsula. 37 miles (60 km) long; 22 miles (35 km) wide.
- a cycle of about 18 years 11 days (6585.32 days) in which eclipses of the sun and moon occur in the same sequence and at the same intervals as in the previous such cycle
- Gulf of Saros an inlet of the Aegean in NW Turkey, north of the Gallipoli Peninsula. Length: 59 km (37 miles). Width: 35 km (22 miles)