noun
: any of three basic classes of foodstuffs carbohydrate, fat, or protein ; especially : the part of a protein that has actually undergone digestion and assimilation as distinguished from the part rejected in feces
noun
: any of three basic classes of foodstuffs carbohydrate, fat, or protein ; especially : the part of a protein that has actually undergone digestion and assimilation as distinguished from the part rejected in feces
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012