tannic acid


Example Sentences

Recent Examples on the Web Add a pinch of baking soda to neutralize the tannic acid in the brew. Jenny Comita, Better Homes & Gardens, 16 Apr. 2021 Don’t worry about the tannic acid in the leaves, our alkaline, highly buffered soils are not negatively affected. Calvin Finch, ExpressNews.com, 2 Jan. 2020 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, 3 July 2019 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, 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.

Word History

First Known Use

1836, in the meaning defined above

Time Traveler
The first known use of tannic acid was in 1836

Dictionary Entries Near tannic acid

Cite this Entry

“Tannic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tannic%20acid. Accessed 9 Feb. 2023.

Kids Definition

tannic acid

tan·​nic acid
: tannin

Medical Definition

tannic acid

tan·​nic acid ˌtan-ik- How to pronounce tannic acid (audio)
: a tannin occurring especially in extracts from nutgalls and yielding gallic acid on hydrolysis

called also digallic acid, gallotannic acid, gallotannin


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