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” ( tea ) + -ine ²

Example Sentences

Theine retired young and initially handed her retirement money to a broker.

From Seattle Times

Theine, thē′in, n. a bitter crystallisable volatile principle found in tea.—ns.

From Project Gutenberg

Theobrō′mine, an alkaloid principle, similar to theine and caffeine, existing in the chocolate nut.

From Project Gutenberg

The properties of guarana as a nervous stimulant and restorative are due to the presence of what was originally described as a new principle and termed guaranine, but is now known to be identical with caffeine or theine.

From Project Gutenberg

It is a suggestive fact that it contains the same principle which is found in both tea and coffee and is called theine or caffeine.”

From Scientific American