Breadcrumb Home > Dictionary > Index D disubstituted: Meaning and Definition of Find definitions for: di•sub•sti•tut•ed Pronunciation: (dī-sub'sti-t"tid, -ty"-), [key] — adj. Chem. containing two substituents. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. distyle disulfate ✖ Related Content Daily Word Quiz: tautology Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language