/ Dictionary / Index S Siphnos: Meaning and Definition of Find definitions for: Siph•nos Pronunciation: (sif'nos, -nôs), [key] — n. a Greek island in the SW Aegean Sea, in the Cyclades group: gold and silver mines. 28 sq. mi. (75 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sipe siphon Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language