Definition of theanine in English:

theanine

Pronunciation /ˈTHēəˌnēn/ /ˈθiəˌnin/

noun

Biochemistry
  • An amino acid found primarily in the tea plant (Camellia sinensis), frequently used as a dietary supplement and to treat anxiety.

    Chemical formula: C₂H₅(NH)COC₂H₂C(NH₂)COOH