theine

[ thee-een, -in ]
/ ˈθi in, -ɪn /

noun

caffeine, especially in tea.

Origin of theine

1830–40; < New Latin the(a) tea + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for theine

British Dictionary definitions for theine

theine

/ (ˈθiːiːn, -ɪn) /

noun

another name for caffeine, esp when present in tea

Word Origin for theine

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