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caf·feine
 caffeine
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- pronunciation:
- kae
fin
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition: |
a substance in coffee, tea, chocolate, and some other foods. Caffeine can make your heart beat fast and keep you awake.
Sandra drinks tea without caffeine so she can sleep better. |
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| derivation: |
caffeinic (adj.) |
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