macronutrient

noun

1. Nutrition. any of the nutritional components of the diet that are required in relatively large amounts: protein, carbohydrate, fat, and the macrominerals.
2. Botany. any of the three chemical elements required by plants in relatively large amounts: nitrogen, phosphorus, and potassium.

noun

1. any substance, such as carbon, hydrogen, or oxygen, that is required in large amounts for healthy growth and development

n.

1. A nutrient required in large amounts for the normal growth and development of an organism.