theine

theine

[thee-een, -in]
noun
caffeine, especially in tea.

Origin:
1830–40; < Neo-Latin the(a) tea + -ine2

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World English Dictionary
theine (ˈθiːiːn, -ɪn)
 
n
another name for caffeine, esp when present in tea
 
[C19: from New Latin thea tea + -ine²]

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