/ Dictionary / Index M mucilage: Meaning and Definition of Find definitions for: mu•ci•lage Pronunciation: (my'su-lij), [key] — n. any of various, usually liquid, preparations of gum, glue, or the like, used as an adhesive. any of various gummy secretions or gelatinous substances present in plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mucilage (Thesaurus) muciferous mucilaginous Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language