[{"Bold_text": "noun", "List Items": ["Biochemistry.a compound, CO(NH2)2, occurring in urine and other body fluids as a product of protein metabolism.", "Chemistry.a water-soluble powder form of this compound, obtained by the reaction of liquid ammonia and liquid carbon dioxide: used as a fertilizer, animal feed, in the synthesis of plastics, resins, and barbiturates, and in medicine as a diuretic and in the diagnosis of kidney function."]}]