/ Dictionary / Index C carcino-: Meaning and Definition of Find definitions for: carcino- Pronunciation: [key] a combining form meaning “cancer,” used in the formation of compound words: carcinogen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Carchemish carcinogen Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language