Definitions
from The Century Dictionary.
- noun An alkaloid, C8H10N4O2, crystallizing in slender, silk-like needles which have a bitter taste, found in coffee-beans.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A white, bitter, crystallizable substance, found in coffee and tea. It is identical with the alkaloid
theine from tea leaves, and withguaranine from guarana. It is responsible for most of the stimulating effect of coffee or tea.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Alternative spelling of
caffeine .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
Etymologies
Sorry, no etymologies found.
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Examples
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Certain trees growing wild in the Comoro Islands and Madagascar are known as caffein-free coffee trees.
All About Coffee 1909
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Coffee, as is well known, contains an active principle known as caffein which acts as a stimulant to the nervous system and in small quantities is very beneficial.
All About Coffee 1909
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Though the flavors of tea, coffee, and cocoa are so different, they all depend for their effect upon a spicy-tasting substance, called caffein from its having been first separated out of coffee.
A Handbook of Health Woods Hutchinson 1896
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It takes a while to get past the craving for the caffein and sugar high, but once done it makes a huge difference.
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I'm incredibly caffein sensitive and I can drink it before napping.
Beat Caffeine Addiction, Then Stay Awake With Placebos | Lifehacker Australia 2009
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Then, when they aren't ready for bed at 8pm, you think "Oh no, they've got Hyperactivity Disorder"- no, they're just so jacked up on sugar and caffein that they can't sit still long enough to blink. wowohwow
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I'm incredibly caffein sensitive and I can drink it before napping.
Beat Caffeine Addiction, Then Stay Awake With Placebos | Lifehacker Australia 2009
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I, too, cannot have breakfast without having a rush of caffein intake first.
breakfast in a glass myriam 2007
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According to a new study, caffein raises blood pressure but lowers heart rates in children during exercise.
Archive 2006-04-23 Edward Willett 2006
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Oh – ai also hav Erl Grey tee fur teh non-cowfee drinkers – an sum herbalz fur tehnon caffein peepl.
Sry. We not interested in ur - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger? 2008
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