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theine

American  
[thee-een, -in] / ˈθi in, -ɪn /

noun

  1. caffeine, especially in tea.


theine British  
/ ˈθiːiːn, -ɪn /

noun

  1. another name for caffeine, esp when present in tea

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of theine

First recorded in 1830–40; from New Latin the(a) “tea” ( see origin at tea) + -ine 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Judging by diminished effects upon tea drinkers, some of the volatile theine is also lost.

From Tea Leaves by Leggett, Francis

There is more theine or caffeine in tea leaves than in coffee.

From The Foundations of Japan Notes Made During Journeys Of 6,000 Miles In The Rural Districts As A Basis For A Sounder Knowledge Of The Japanese People by Scott, J.W. Robertson

They were suffering, in fact, from "theine" poisoning.

From Study and Stimulants; Or, the Use of Intoxicants and Narcotics in Relation to Intellectual Life by Reade, Alfred Arthur

The active principles of the leaves are theine and a volatile oil, to which latter the flavor and odor are due.

From Catalogue of Economic Plants in the Collection of the U. S. Department of Agriculture by Saunders, William

They have been called cafeine and theine, respectively.

From The Atlantic Monthly, Volume 03, No. 15, January, 1859 by Various

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