Word.ws English Dictionary

caffeina

caffeina is the obsolete form of caffeine.

Meaning of caffeine

Noun

caffeine (usually uncountable, plural caffeines)

  1. (usually) An alkaloid, C₈H₁₀N₄O₂, found naturally in tea and coffee plants, which acts as a mild stimulant on the central nervous system.
    • For example, 0.100 grams of caffeine yield by combustion, by weight, 0.180 grammes of carbonic acid.1839, Justus von Liebig, translated by William Gregory, Instructions for Organic Analysis, Glasgow, Scotland, United Kingdom: Richard Griffin & Company, page 35

Questions about caffeina

What is caffeina the obsolete form of?
Caffeina is the obsolete form of caffeine.

Words near caffeina in the dictionary

  1. Caffee
  2. Caffees
  3. caffeic
  4. caffeic acid
  5. caffein
  6. caffeina
  7. caffeinate
  8. caffeinated
  9. caffeinates
  10. caffeinating
  11. caffeinator

Source and license

Adapted from Wiktionary: caffeina (page history and authors); caffeine (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “caffeina.” Word.ws, https://word.ws/caffeina. Based on Wiktionary, CC BY-SA 4.0.