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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.

The flavor of both is due to a principle, theine in tea, caffeine in coffee, in which both the good and the ill effects of these drinks are bound up.

From The Easiest Way in Housekeeping and Cooking Adapted to Domestic Use or Study in Classes by Campbell, Helen

It was claimed for this special model that it extracted only the theine, and not the tannin from the tea.

From The Art of Living in Australia ; together with three hundred Australian cookery recipes and accessory kitchen information by Mrs. H. Wicken by Muskett, Philip E.

Coffee contains caffein, a principle identical with theine and a modified form of tannin, though in less quantity than tea.

From Science in the Kitchen. by Kellogg, Mrs. E. E.

The active principle of tea is called theine; that of coffee, caffeine, and of cocoa, theobromine.

From A Practical Physiology by Blaisdell, Albert F.

The chemical principle of tea, namely theine, was subsequently tried and produced no effect.

From Insectivorous Plants by Darwin, Charles

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