Coumaric \Cou*mar"ic\ (k??-m?r"?k), a. Relating to, derived from, or like, the Dipterix odorata, a tree of Guiana. [1913 Webster]

Coumaric acid (Chem.), one of a series of aromatic acids, related to cinnamic acid, the most important of which is a white crystalline substance, HO.C6H4.C2H2.CO2H, obtained from the tonka bean, sweet clover, etc., and also produced artificially. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Coumaric \Cou*mar"ic\ (k??-m?r"?k), a. Relating to, derived from, or like, the Dipterix odorata, a tree of Guiana.

Coumaric acid (Chem.), one of a series of aromatic acids, related to cinnamic acid, the most important of which is a white crystalline substance, HO.C6H4.C2H2.CO2H, obtained from the tonka bean, sweet clover, etc., and also produced artificially.

Source: Webster's Revised Unabridged Dictionary (1913)