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

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

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

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 Philip E. Muskett

The leaves yield the same bitter principle called theine, which is found in the leaf of the Chinese tea-plant, the coffee berry, &c.

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 P. L. Simmonds

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 R. L. Alsaker

They were suffering, in fact, from "theine" poisoning.

From Study and Stimulants; Or, the Use of Intoxicants and Narcotics in Relation to Intellectual Life by Alfred Arthur Reade

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