/ Dictionary / Index C colo-: Meaning and Definition of Find definitions for: colo- Pronunciation: [key] a combining form representing in compound words: colostomy. Colo. Pronunciation: [key] Colorado. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cöln colobus Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language