/ Dictionary / Index C cysto-: Meaning and Definition of Find definitions for: cysto- Pronunciation: [key] a combining form representingin the formation of compound words: cystolith. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cystitis cystocarp Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language