citric acid

noun

cit·​ric acid ˈsi-trik- 

: a tricarboxylic acid C₆H₈O₇ occurring in cellular metabolism, obtained especially from lemon and lime juices or by fermentation of sugars, and used chiefly as a flavoring

Examples of citric acid in a Sentence

Recent Examples on the Web

This leave-in treatment is powered by citric acid and a concentrated bond-building care complex to strengthen weak bonds, moisturize, smooth, protect against heat up to 450 degrees Fahrenheit, and stave off color fading. —Kiana Murden, Vogue, 26 June 2025

Lemons contain high doses of citric acid, which opens hair cuticles and allows sunlight to reach the melanin beneath. —Rosie McCall, Discover Magazine, 23 June 2025

The only other three ingredients are carbon dioxide, citric acid, and ascorbic acid. —Symiah Dorsey, Southern Living, 3 May 2025

Furthermore, alpha hydroxy acid—citric acid, to be exact—adds a little exfoliation to the mix, sweeping away dead skin cells and excess oils while brightening the complexion and helping skin absorb other products like toners, serums, and moisturizers. —Jennifer Hussein, Allure, 14 June 2025

Word History

Etymology

International Scientific Vocabulary

First Known Use

1790, in the meaning defined above

Rhymes for citric acid

• antacid
• placid

Kids Definition

citric acid

noun

cit·​ric acid ˌsi-trik- 

: a pleasantly sour-tasting organic acid obtained especially from lemon and lime juices or by the chemical breakdown of sugars and used as a flavoring

Medical Definition

citric acid

noun

cit·​ric acid ˌsi-trik- 

: a sour organic acid C₆H₈O₇ occurring in cellular metabolism, obtained especially from lemon and lime juices or by fermentation of sugars, and used as a flavoring