/ Dictionary / Index M mucoid: Meaning and Definition of Find definitions for: mu•coid Pronunciation: (my'koid), [key] — n. any of a group of substances resembling the mucins, occurring in connective tissue, cysts, etc. —adj. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mucoid (Thesaurus) muco- mucolytic 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