Macronutrient definition

măkrō-no͝otrē-ənt, -nyo͝o-
A substance required in relatively large amounts for the normal growth and development of an organism. Macronutrients for animals include fat, carbohydrate, and protein, while for most plants they include chemical elements such as carbon, hydrogen, oxygen, nitrogen, and phosphorus.
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An element (such as carbon, hydrogen, oxygen, or nitrogen) or a nutrient (such as a protein, fat, or carbohydrate) required in large amounts for the normal growth and development of an organism.
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Any of the chemical elements, as carbon, required in relatively large quantities for plant growth.
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Any of the elements required in large amounts by all living things.
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Other Word Forms

Noun

Singular:
macronutrient
Plural:
macronutrients

Origin of macronutrient