/ Dictionary / Index M magnetic pyrites: Meaning and Definition of Find definitions for: magnet'ic py'rites Pronunciation: [key] pyrrhotite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. magnetic pulley magnetic quantum number Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language