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