gallic acid

noun

gal·​lic acid ˈga-lik-  ˈgȯ-lik- 

: a white crystalline acid C₇H₆O₅ found widely in plants or combined in tannins and used especially in dyes and as a photographic developer

Examples of gallic acid in a Sentence

Recent Examples on the Web

This plant is rich in a variety of phytochemicals, including flavonoids, tannins, organic acids, and polyphenolic compounds, such as myricetin and gallic acid. — Lana Barhum, Verywell Health, 13 May 2026

Sorghum Sorghum is a gluten-free grain that’s high in protein, magnesium, B vitamins, and several protective phenolic compounds such as ferulic acid, gallic acid, luteolin, and apigenin. — Jillian Kubala, Health, 8 Apr. 2026

The paper was then washed, dried, further sensitized with a solution of gallic acid and silver nitrate, then loaded into a camera and exposed. — Anika Burgess july 17, Literary Hub, 17 July 2025

Over time, its blend of niacinamide, alpha arbutin, and kojic and gallic acid promises to brighten stubborn dark spots. — Jenny Berg, Vogue, 19 May 2025

This formula also features nourishing hyaluronic acid, garland lily extract, and gallic acid with a blend of ferulic acid and vitamin E to support UV and blue light protection. — Jessie Quinn, Peoplemag, 28 Aug. 2023

Word History

Etymology

borrowed from French (acide) gallique, from galle gall entry 3 + -ique -ic entry 1

First Known Use

1788, in the meaning defined above

Rhymes for gallic acid

• antacid
• placid

Medical Definition

gallic acid

noun

gal·​lic acid ˌgal-ik-  ˌgȯ-lik- 

: a white crystalline acid C₇H₆O₅ found widely in plants or combined in tannins and used especially in dyes and writing ink and as a photographic developer