theine

[ thee-een, -in ]

noun

1. caffeine, especially in tea.

theine

/ ˈθiːiːn; -ɪn /

noun

1. another name for caffeine, esp when present in tea

Word History and Origins

Origin of theine¹

First recorded in 1830–40; from New Latin the(a) “tea” ( tea ) + -ine ²

Word History and Origins

Origin of theine¹

C19: from New Latin thea tea + -ine ²

Example Sentences

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

From Seattle Times

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

From Project Gutenberg

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

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