noun
- Plural of caffeine; multiple instances or types of the stimulant alkaloid found in coffee, tea, and other beverages.
Usage: Typically used in scientific, medical, or comparative contexts when discussing different sources or amounts of caffeine.
Examples
- Different caffeines from various coffee beans have slightly different chemical compositions.
- The study compared caffeines extracted from tea and coffee.
- Energy drinks contain multiple caffeines and other stimulants.
- Researchers tested how different caffeines affected sleep patterns.
- The caffeines in espresso and regular coffee have similar effects on the body.