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 berries contain theine; so also do the leaves, and in some countries the latter are preferred.

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

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

Through: tre uisge is tre theine, through water and through fire.

From Elements of Gaelic Grammar by Stewart, Alexander

Now this quantity is contained in 0.6 parts of theine, or 2 grains 8/10ths of theine can give to an ounce of bile the nitrogen it contains in the form of taurine.

From The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. by Simmonds, P. L.

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 Snyder, Harry