/ Dictionary / Index S santonin: Meaning and Definition of Find definitions for: san•to•nin Pronunciation: (san'tu-nin), [key] — n. Chem. a crystalline compound, CHO, the active principle of santonica. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. santonica Santorin Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language