/ Dictionary / Index M muco-: Meaning and Definition of Find definitions for: muco- Pronunciation: [key] a combining form representingorin compound words: mucopurulent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mucluc mucoid Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language