Definition of saros
: a lunar cycle of 6585.32 days at the end of which the centers of sun and moon return so nearly to their relative positions at the beginning that all the eclipses of the period recur approximately as before though in longitudes about 120 degrees west of the regions where they were visible in the saros immediately preceding
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of saros
Greek, from Akkadian shāru cycle of 3600 years
Seen and Heard
What made you want to look up saros? Please tell us where you read or heard it (including the quote, if possible).