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WordReference Random House Unabridged Dictionary of American English © 2024mac•ro•nu•tri•ent (mak′rō no̅o̅′trē ənt, -nyo̅o̅′-),USA pronunciation n. - Nutritionany of the nutritional components of the diet that are required in relatively large amounts: protein, carbohydrate, fat, and the macrominerals.
- Botanyany of the three chemical elements required by plants in relatively large amounts: nitrogen, phosphorus, and potassium. Cf. micronutrient.
- macro- + nutrient 1940–45
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