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caffeine

play
noun caf·feine \ka-ˈfēn, ˈka-ˌ\

Simple Definition of caffeine

  • : a substance that is found especially in coffee and tea and that makes you feel more awake

Source: Merriam-Webster's Learner's Dictionary

Full Definition of caffeine

  1. :  a bitter alkaloid C8H10N4O2 found especially in coffee, tea, cacao, and kola nuts and used medicinally as a stimulant and diuretic


CAFFEINE Defined for Kids

caffeine

play
noun caf·feine \ka-ˈfēn, ˈka-ˌfēn\

Definition of caffeine for Students

  1. :  a substance found especially in coffee and tea that makes a person feel more awake




Medical Dictionary

caffeine

play
noun caf·feine \ka-ˈfēn, ˈka-ˌ; ˈkaf-ē-ən\

Medical Definition of caffeine

  1. :  a bitter alkaloid C8H10N4O2 found especially in coffee, tea, and kola nuts and used medicinally as a stimulant and diuretic

caffeinic

\ka-ˈfē-nik, ˌkaf-ē-ˈin-ik\play play adjective



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