/ Dictionary / Index S saponite: Meaning and Definition of Find definitions for: sap•o•nite Pronunciation: (sap'u-nīt"), [key] — n. a clay mineral, hydrous magnesium aluminum silicate, belonging to the montmorillonite group: found as a soft filling in rock cavities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. saponin sapor Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language