hyaluronic acid

noun

hy·​al·​uron·​ic acid ˌhī(-ə)l-yu̇-ˈrä-nik 

: a viscous glycosaminoglycan chiefly of the matrix of tissues that occurs especially in the vitreous humor, umbilical cord, synovial fluid, and loose connective tissue and serves especially as a structural element and lubricant

Examples of hyaluronic acid in a Sentence

Recent Examples on the Web

Ingredients like hyaluronic acid, caffeine, peptides, and brighteners such as licorice root extract and vitamin C help improve skin over time. —Jailynn Taylor, Allure, 13 June 2026

The CeraVe formula is also packed with ceramides, another ingredient Hall recommends to incorporate when using strong actives to protect and strengthen the skin barrier, as well as hyaluronic acid to draw moisture into the skin. —Maggie Horton, PEOPLE, 12 June 2026

Note the concentration of hyaluronic acid too. —Ellie Davis, Vogue, 11 June 2026

Unfortunately, hyaluronic acid decreases with age, which can contribute to a loss of plumpness, fine lines, and an overall duller complexion. —Sherri Gordon, Health, 10 June 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1934, in the meaning defined above

Rhymes for hyaluronic acid

• antacid
• placid

Medical Definition

hyaluronic acid

noun

hy·​al·​uron·​ic acid ˌhīl-yu̇-ˌrän-ik-  ˌhī-əl-yu̇- 

: a viscous glycosaminoglycan that occurs especially in the vitreous body, the umbilical cord, and synovial fluid and as a cementing substance in the subcutaneous tissue