/ Dictionary / Index C cytidine: Meaning and Definition of Find definitions for: cyt•i•dine Pronunciation: (sit'i-dēn", -din, sī'ti-), [key] — n. Biochem. a white crystalline powder, CHNO, that is a ribonucleoside consisting of d-ribose and cytosine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cytidine (Thesaurus) Cytherean cytidine monophosphate Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language