/ Dictionary / Index C cteno-: Meaning and Definition of Find definitions for: cteno- Pronunciation: [key] a combining form meaning “comb,” used in the formation of compound words: Ctenophora. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ctenizid ctenoid 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