tannic acid

American  

[tan-ik as-id] / ˈtæn ɪk ˈæs ɪd /

noun

Chemistry.

1. a form of tannin with weak acidity, used commercially in dyes and wood stains; corrosion inhibitors; certain antihistamine, antitussive, and antidiarrhea medications; and especially wine, beer, and other beverages that benefit from its clarifying and aroma-enhancing properties: Aleppo galls are among the principal sources of tannic acid.

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tannic acid Scientific  

/ tăn′ĭk /

1. A lustrous, yellow-brown, amorphous substance, having the approximate chemical composition C ₇₆ H ₅₂ O ₄₆. It is derived from the bark and fruit of many plants and is used in tanning leather, in fixing dyes to materials, and in clarifying wine and beer.

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Etymology

Origin of tannic acid

First recorded in 1830–40

Example Sentences

The team applied metal-polyphenol nano-coating technology based on tannic acid to improve performance and durability.

From Science Daily • Dec. 2, 2024

Apparently, the tannic acid in the tea helped stop bleeding.

From Seattle Times • Oct. 25, 2023

Schulz said, at the time, one of the preferred methods to treat victims was to paint burned areas with tannic acid.

From Seattle Times • Nov. 27, 2017

The lake I am staying at has lost a lot of water clarity due to an excessive amount of tannic acid.

From New York Times • Jul. 9, 2010

This much I knew: in order to tan hide, it has to be steeped in tannic acid.

From "My Side of the Mountain" by Jean Craighead George