/ Dictionary / Index M magnalium: Meaning and Definition of Find definitions for: mag•na•li•um Pronunciation: (mag-nā'lē-um), [key] — n. an alloy of magnesium and aluminum, sometimes also containing copper, nickel, tin, and lead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Magna Graecia Magna Mater Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language