another name for caffeine, esp when present in tea
Word origin
C19: from New Latin thea tea + -ine2
theine in American English
(ˈθiˌin; ˈθiɪn)
noun
caffeine
Word origin
ModL theina < thea: see theophylline
theine in American English
(ˈθiin, -ɪn)
noun
caffeine, esp. in tea
Word origin
[1830–40; ‹ NL the(a) tea + -ine2]This word is first recorded in the period 1830–40. Other words that entered Englishat around the same time include: isomerism, isometric, nationalism, orientation, paraffin-ine is a suffix, of no assignable meaning, appearing in nouns of Greek, Latin, or Frenchorigin. Other words that use the affix -ine include: doctrine, famine, routine
Examples of 'theine' in a sentence
theine
The chemical principle of tea, namely theine, was subsequently tried and produced no effect.
Charles Darwin Insectivorous Plants (1875). Retrieved in 2019 from Project Gutenberg (https://www.gutenberg.org/ebooks/)