/ Dictionary / Index S subsulfate: Meaning and Definition of Find definitions for: sub•sul•fate Pronunciation: (sub-sul'fāt), [key] — n. Chem. a basic salt of sulfuric acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. substructure subsume 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