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

There’s hydrating hyaluronic acid, caffeine for puffiness, soothing aloe leaf, and green tea for antioxidant protection. —Marie Lodi, StyleCaster, 13 Oct. 2025

It’s made of 75% water, plus hydrating aloe vera, hyaluronic acid, glycerin, and antioxidant-rich green tea to keep lips soft and plump. —Lily Wohlner, Allure, 10 Oct. 2025

Each pad, though, is drenched in a cocktail of red wine extract, lactic acid, resveratrol, raspberry extract, and hyaluronic acid for topical treatments, too. —Conçetta Ciarlo, Vogue, 8 Oct. 2025

Tarte’s Maracuja Juicy Lip Balm Gloss, which grants just this kind of effect with its complex of hyaluronic acid and over 10 superfruits that smooth out lip lines and make for a plumper-looking pout. —Stacia Datskovska, Footwear News, 8 Oct. 2025

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