theine

American  

[thee-een, -in] / ˈθi in, -ɪn /

noun

1. caffeine, especially in tea.

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theine British  

/ ˈθiːiːn, -ɪn /

noun

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

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Etymology

Origin of theine

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

Example Sentences

The theine in tea and the theobromine in cocoa are so similar to caffeine that chemists can not differentiate them.

From Maintaining Health Formerly Health and Efficiency by Alsaker, R. L.

Both theine and tannin are more abundant in green than in black tea.

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

The caffein or theine in tea is an alkaloid that has characteristic physiological properties.

From Human Foods and Their Nutritive Value by Snyder, Harry

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

From A Practical Physiology by Blaisdell, Albert F.