NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,018 terms related to cancer and medicine.
- listen (thee-oh-BROH-meen)
- A substance that is closely related to caffeine and is found in cocoa beans, cola nuts, and tea. It may also be made in the laboratory. Theobromine is used to increase the amount of urine made by the kidneys, to stimulate the heart, and to widen blood vessels. It is a type of alkaloid.