Breadcrumb Home > Dictionary > Index M mussel: Meaning and Definition of Find definitions for: mus•sel Pronunciation: (mus'ul), [key] — n. any bivalve mollusk, esp. an edible marine bivalve of the family Mytilidae and a freshwater clam of the family Unionidae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mussel (Thesaurus) mussaka mussel crab ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language