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

Lactic acid also helps on the hydration front, where it’s aided by hyaluronic acid, a moisturizing superstar known to help lock in water without adding a ton of weight or greasiness. —Sara Coughlin, SELF, 20 June 2024

Infused with hyaluronic acid, squalane, and natural moisturizing ingredients, this lightweight milky serum works to hydrate dry, flaky scalps. —Kiana Murden, Vogue, 15 June 2024

It’s also enriched with hyaluronic acid, which, per Dr. Hartman, helps hydrate the skin — especially noteworthy considering the sun’s ability to dry out unprotected skin. —Lauren Dana Ellman, Travel + Leisure, 31 May 2024

The formula is infused with ultra-hydrating hyaluronic acid and squalane, which locks the moisturizing ingredients in overnight. —Alyssa Brascia, Peoplemag, 30 May 2024

Word History

Etymology

International Scientific Vocabulary

First Known Use

1934, in the meaning defined above

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