Meanings
theine1
nountheine (uncountable)
- uncountablechemistryCaffeine 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.
2010, Crispian Scully, Medical Problems in Dentistry E-Book, Elsevier Health Sciences, →ISBN, page 693
theine2
Origin
- Frenchthéine
- Englishtheine
From French théine.
More words from French
Full word history & related roots →Translations
Czech tein
- teinCaffeine in tea
Finnish teiini
- teiiniCaffeine in tea
French théine
- théineCaffeine in tea
German Tein
- TeinCaffeine in tea
Greek τεΐνη
- τεΐνη (teḯni)Caffeine in tea
Hungarian tein
- teinCaffeine in tea
Italian teina
- teinaCaffeine in tea
Polish teina
- teinaCaffeine in tea
Portuguese teína
- teínaCaffeine in tea
Romanian teină
- teinăCaffeine in tea
Russian теи́н
- теи́н (teín)Caffeine in tea
Spanish teína
- teínaCaffeine in tea
Swedish tein
- teinCaffeine in tea
Turkish tein
- teinCaffeine in tea
Rhymes & wordplay
Anagrams
Cite this entry
APA
theine. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/theine
MLA
“theine.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/theine. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “theine,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/theine.
Source: theine on Wiktionary, CC BY-SA 4.0.