Macronutrient definition

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.

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.

Any of the chemical elements, as carbon, required in relatively large quantities for plant growth.