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Meaning of macromineral

mac•ro•min•er•al

Pronunciation: (mak"rō-min'ur-ul), [key]
— n. Nutrition.
  1. 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.