Cinnamic \Cin*nam"ic\, a. [From {Cinnamon}.] (Chem.)
Pertaining to, or obtained from, cinnamon.
[1913 Webster]
{Cinnamic acid} (Chem.), a white, crystalline, odorless
substance. {C6H5.C2H2C2H2.CO2H}, formerly obtained from
storax and oil of cinnamon, now made from certain benzene
derivatives in large quantities, and used for the
artificial production of indigo.
[1913 Webster]