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

After the plasma step, the materials are treated with citric acid at room temperature, avoiding the need for high heat or strong industrial chemicals. —Neetika Walter, Interesting Engineering, 25 Mar. 2026

The extremely concentrated formula makes a difference after one use thanks to a unique bonding complex and citric acid, which work in tandem to reinforce and rebuild weakened strands. —Danielle Sinay, Glamour, 23 Mar. 2026

The citric acid reacted with the cellulose to form cross-links, which are chemical junctions that bind the cellulose molecules. —J. Carson Meredith, The Conversation, 17 Mar. 2026

According to Navarro, lemon juice operates in the same way as citric acid and leaves a clean, pleasant scent. —Louise Parks, Martha Stewart, 16 Mar. 2026

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