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

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 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

Tea contains two harmful substances, theine and tannin,—from three to six per cent of the former and more than one fourth its weight of the latter.

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

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

From Tea Leaves by Leggett, Francis

It possesses properties similar to the leaves of coca and contains theine.

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