/ Dictionary / Index M macromineral: Meaning and Definition of Find definitions for: mac•ro•min•er•al Pronunciation: (mak"rō-min'ur-ul), [key] — n. Nutrition. any mineral required in the diet in relatively large amounts, esp. calcium, iron, magnesium, phosphorus, potassium, and zinc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. macrometeorology macromolecule Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language