[{"Bold_text": "noun", "List Items": ["Chemistry, Pharmacology.a white, crystalline, bitter alkaloid ,C8H10N4O2, usually derived from coffee or tea: used in medicine chiefly as a nervous system stimulant.", "Informal.a drink, usually coffee or tea, containing this stimulant:We sipped our caffeine on the balcony with its views of sea stacks, rocky coves, and the ever-changing ocean."]}]