tannic acid

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tannic acid

 [tan´ik]
a substance obtained from nutgalls, oak bark, and other plant parts, formerly used in medicine as an astringent. It is no longer used alone because it can be absorbed through mucous membranes or damaged skin in amounts sufficient to produce hepatic necrosis, although it is still used as a component of dermatological preparations.

tan·nic ac·id

(tan'ik as'id),
A tannin that occurs in many plants, particularly in the bark of oaks and other members of the Fagaceae; used as a styptic and astringent, and in the treatment of diarrhea; available also as tannic acid glycerite. Sometimes used synonymously with tannin.

tan·nic ac·id

(tan'ik as'id)
A tannin that occurs in many plants; used as a styptic and astringent and to treat diarrhea.

tannic acid

An antifungal drug, used externally to treat fungus infections of the skin. A brand name of a preparation containing tannic acid and other drugs is Phytex.