/ Dictionary / Index M mucilaginous: Meaning and Definition of Find definitions for: mu•ci•lag•i•nous Pronunciation: (my"su-laj'u-nus), [key] — adj. of, pertaining to, or secreting mucilage. of the nature of or resembling mucilage; moist, soft, and viscid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mucilaginous (Thesaurus) mucilage mucin Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language