Webster's Revised Unabridged Dictionary · 1913

Cinnamic

Cinnamic , adjective

[From Cinnamon.]

(Chemistry) Pertaining to, or obtained from, cinnamon.
Collocations (1)
Cinnamic acid (Chemistry) , 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.