/ Dictionary / Index M Mumetal: Meaning and Definition of Find definitions for: Mu•met•al Pronunciation: (m'met"l, my'-), [key] — n. an alloy containing nickel, iron, and copper, characterized by high magnetic permeability and low hysteresis losses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mu meson Mumford 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