/ Dictionary / Index S sardonyx: Meaning and Definition of Find definitions for: sar•don•yx Pronunciation: (sär-don'iks, sär'dn-), [key] — n. a chalcedony that is used for cameos and has sard and chalcedony of another color, usually white, arranged in straight parallel bands. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sardonyx (Thesaurus) sardonic Sardou Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language