|
|
caf·feine
 caffeine
|
|
- pronunciation:
- kae
fin
| part of speech: |
noun |
| definition: |
a bitter substance found in coffee, tea, chocolate, and some sodas. Caffeine stimulates the heart and nervous system and can cause a person to stay awake and alert.
|
| derivation: |
caffeinic (adj.) |
|
|