Category:Tannic

Tan"nic, a.

Defn: of or pertaining to tan; derived from, or resembling, tan; as, Tannic acid. Tannic acid. (chem.) (a) an acid obtained from nutgalls As a yellow amorphous substance, c14h10o9, having an astringent Taste, and forming with ferric salts a bluish-black compound, which Is the basis of common ink. Called also tannin, and gallotannic acid. (b) by extension, any one of a series of astringent substances Resembling tannin proper, widely diffused through the vegetable Kingdom, as in oak bark, willow, catechu, tea, coffee, etc.