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theine

[ thee-een, -in ]
/ ˈθi in, -ɪn /
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noun

caffeine, especially in tea.

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Origin of theine

First recorded in 1830–40; from New Latin the(a) “tea” (see origin at tea) + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for theine

theine
/ (ˈθiːiːn, -ɪn) /

noun

another name for caffeine, esp when present in tea
C19: from New Latin thea tea + -ine ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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