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

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Example Sentences

See Examples For:

theine

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 William Saunders

Good black tea contains of theine from 2.00 to 2.13 per cent.

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

The first of these is caffeine, which is almost identical in composition with, and practically the same as, the theine present in tea.

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

The quantity of theine consumed in a cup of tea is about 4/5 of a grain, or ¼ of a medicinal dose.

From Human Foods and Their Nutritive Value by Harry Snyder

Half-minims were placed, in each case; on the discs of at least six leaves, but no inflection was caused, except perhaps a very slight amount by the theine.

From Insectivorous Plants by Charles Darwin

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