Dictionary.com

theine

[ thee-een, -in ]
/ ˈθi in, -ɪn /
Save This Word!

noun

caffeine, especially in tea.

QUIZZES

QUIZ YOURSELF ON “ITS” VS. “IT’S”!

Apostrophes can be tricky; prove you know the difference between it’s and its in this crafty quiz!
Question 1 of 12
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.
it's
its
TAKE THE QUIZ TO FIND OUT

Origin of theine

First recorded in 1830–40; from New Latin the(a) “tea” (see origin at tea) + -ine2

Words nearby theine

the idea, Idylls of the King, The, Theiler, The Iliad, Importance of Being Earnest, The, theine, inside track, the, Inspector-General, The, in thing, the, Invisible Man, The, their
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences 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
Get Online Help For Kids!