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

This means that TruSkin’s beloved Vitamin C Serum, plus hydrating sunscreen, replenishing hyaluronic acid serum, and brightening cleansers are fair game. —Nicol Natale, PEOPLE, 16 Apr. 2026

This serum contains three types of plum (kakadu, illawarra and burdekin) for maximum antioxidants and hyaluronic acid. —Bestreviews, Mercury News, 16 Apr. 2026

Thanks to Heparan Sulfate Analog (a moisturizing ingredient similar to hyaluronic acid), green tea extract, and quinoa extract, this Senté cream is deeply moisturizing, inflammation-reducing, and wrinkle-fading. —Tamim Alnuweiri, InStyle, 13 Apr. 2026

The ceramides and hyaluronic acid pull moisture into the skin for up to 24 hours. —Bestreviews, Chicago Tribune, 9 Apr. 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