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theobromine vs. caffeine

theobromine
[thee-uh-broh-meen, -min] / ˌθi əˈbroʊ min, -mɪn /

noun

Pharmacology.

  1. a white, crystalline, water-insoluble, poisonous powder, C 7 H 8 N 4 O 2 , an isomer of theophylline and lower homologue of caffeine, occurring in tea and obtained from the cacao bean: used chiefly as a diuretic, myocardial stimulant, and vasodilator.

caffeine
[ka-feen, kaf-een, kaf-ee-in] / kæˈfin, ˈkæf in, ˈkæf i ɪn /
Rarely caffein

noun

  1. Chemistry, Pharmacology. a white, crystalline, bitter alkaloid, C 8 H 10 N 4 O 2 , usually derived from coffee or tea: used in medicine chiefly as a nervous system stimulant.

  2. 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.