/ Dictionary / Index S saponaceous: Meaning and Definition of Find definitions for: sap•o•na•ceous Pronunciation: (sap"u-nā'shus), [key] — adj. resembling soap; soapy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: saponaceous (Thesaurus) sapodilla family saponification number Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language