tannic acid

tannic acid /tan·nic ac·id/ (-ik) a substance obtained from nutgalls, used as an ingredient of dermatologic preparations and formerly used as an astringent.

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tannic acid

n.

1. A white or yellowish astringent powder used as a denaturant and in tanning and textiles.

2. A lustrous yellowish to light brown amorphous, powdered, flaked, or spongy mass derived from the bark and fruit of many plants and used as a mordant and to clarify wine and beer.

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tannic acid

[tan′ik]

Etymology: Celt, tann, oak; L, acidus, sour

a substance obtained from the bark and fruit of various trees and shrubs, particularly the nutgalls of oak trees. The acid is used as an astringent and protein precipitant. Also called tannin.

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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.

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tannic acid,

a vegetable tanning agent that attaches itself to collagen by hydrogen bonds. Tannic acid is used in dentistry as a cavity conditioner before placing a restoration.

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tannic acid

a substance obtained from bark and fruit of many plants, used as an astringent.