tannin, likewise called tannic corrosive, any of a gathering of phenolic compounds in woody blooming plants that are significant hindrances to herbivores and have various modern applications. As optional metabolites, tannins are sequestered in vacuoles inside the plant cell, which safeguards the other cell parts. They happen typically in the roots, wood, bark, leaves, and product of many plants, especially in the bark of oak (Quercus) species and in sumac (Rhus) and myrobalan (Terminalia chebula). They additionally happen in nerves, obsessive developments coming about because of bug assaults.
