Pronunciation: (mak"rō-nOO'trē-unt, -nyOO'-), [key]
1. Nutrition.any of the nutritional components of the diet that are required in relatively large amounts: protein, carbohydrate, fat, and the macrominerals.
2. Bot.any of the three chemical elements required by plants in relatively large amounts: nitrogen, phosphorus, and potassium. Cf. micronutrient.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.