/ Dictionary / Index S synizesis: Meaning and Definition of Find definitions for: syn•i•ze•sis Pronunciation: (sin"u-zē'sis), [key] — n. Phonet. the combination into one syllable of two vowels (or of a vowel and a diphthong) that do not form a diphthong. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: synizesis (Thesaurus) syngraft synkaryon Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language