theine

English

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theine^¹

/ˈθiː.iːn/
/ˈθeɪ.iːn/
/ˈteɪ.iːn/

Where it comes from

From French théine.

noun

uncountable Caffeine when present in tea. Caffeine is called guaranine when found in guarana, mateine when found in mate and theine when found in tea. There is far more caffeine in coffees than in teas.

theine^²

noun theines

obsolete Obsolete form of thane

Translations

Every language

noun Caffeine in tea

Español	teína
Português	teína
Français	théine
Deutsch	Tein
Italiano	teina
Ελληνικά	τεΐνη teḯni
Română	teină
Русский	теи́н teín

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MLA

"theine." Wiktionary, via Micwyn, micwyn.com/word/theine. Accessed 6 Nov. 2026.

APA

theine. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/theine

Chicago

"theine." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/theine.

BibTeX

@misc{theine_2026,
  title = {theine},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/theine},
  urldate = {2026-11-06}
}