/ Dictionary / Index S syndesis: Meaning and Definition of Find definitions for: syn•de•sis Pronunciation: (sin'du-sis, sin-dē'-), [key] — pl. -ses synapsis (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. synderesis syndesmectomy Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language