Tannic a. : Of or pertaining to tan; derived from, or resembling, tan; as, tannic acid.

Example:
How do I tan a hide with Tannic acid?

Taxonomy
tannins, condensed tannins, wine, Hydrolysable tannins, hydrolyzable tannins, pomegranate, PMID, iron absorption, plants, red wine, wood, tannin content, tissue, grapes, compounds, tea, phenolic compounds, food.

Defination from the web:
tannic wines without the benefit of food. ... Ingestion of an indigestible saccharide, difructose anhydride III, partially prevents the tannic acid-induced suppression of iron absorption in rats" ...