Definition of theine in English:

theine

noun

  • Caffeine, especially when it occurs in tea.

    • ‘Eventually it was shown that the theine of tea was identical with the caffeine of coffee, and the term theine was then dropped.’
    • ‘Analysis certificates are issued for each processed batch; these certificates also state the percentage of theine and residues still left.’

Origin

Mid 19th century: from modern Latin Thea (former genus name of the tea plant, from Dutch thee) + -ine.

Pronunciation:

theine

/ˈTHēēn//ˈTHēin/