Definition of theine in English:


Line breaks: theine
Pronunciation: /ˈθiːiːn
, ˈθiːɪn


[mass noun]
  • Caffeine, especially when it occurs in tea.
    More example sentences
    • 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.


mid 19th century: from modern Latin Thea (former genus name of the tea plant, from Dutch thee) + -ine4.

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elaborate ornamentation of a vocal melody