tannic acid


Definition of tannic acid

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Recent Examples on the Web

Ground gall nuts, taken from an oak-like tree, were boiled to draw out tannic acid, which was mixed with iron sulfate scraped from nails. Joe Pappalardo, Popular Mechanics, "The Science of Saving the Declaration of Independence," 3 July 2018 Used tea grounds and fresh tea leaves contain nutrients and tannic acid that, when added to the soil, create a more fertile environment for garden, landscape and container plants. OregonLive.com, "How to tell if soil is root of gladiolus' troubles; jump-starting tomatoes: Ask the experts," 10 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tannic acid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of tannic acid

1836, in the meaning defined above

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The first known use of tannic acid was in 1836

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More Definitions for tannic acid

tannic acid

tan·​nic acid | \ ˌtan-ik- How to pronounce tannic acid (audio) \

Medical Definition of tannic acid

1 : a tannin occurring especially in extracts from nutgalls and yielding gallic acid on hydrolysis

called also digallic acid, gallotannic acid, gallotannin

More from Merriam-Webster on tannic acid

Britannica.com: Encyclopedia article about tannic acid

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