from The Century Dictionary and Cyclopedia
- Noting an acid a brown, amorphous compound of uncertain composition. The calcium salt is found in coffee-beans and imparts to them their green color.
Sorry, no etymologies found.
If one admits that caffetannic acid exists in the green bean; that upon oxidation it gives viridic acid; and that it is concentrated in the outer layers of the bean, as certain investigators have claimed, then there is chemical proof of the existence of oxidizing conditions about the exterior of the bean.
It also has been claimed that viridic acid, C_14_H_20_O_11, is present in coffee.