Meaning of theobromine

the•o•bro•mine

Pronunciation: (thē"u-brō'mēn, -min), [key]
— n. Pharm.
  1. a white, crystalline, water-insoluble, poisonous powder, CHNO, 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.