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

Snag this hyaluronic acid serum, and keep scrolling to shop for more best-selling skincare products from Eight Saints. —Rachel Trujillo, PEOPLE, 9 Sep. 2025

While the former depuffs and brightens the under-eye region on days when you’re deprived of zzzs, the latter takes advantage of orange peptides, pomegranate spheres, and hyaluronic acid to further smooth the skin. —Stacia Datskovska, Footwear News, 8 Sep. 2025

This is because the cream is enriched with two types of hyaluronic acid all while brightening, smoothing, and firming your delicate eye contour. —Essence, 5 Sep. 2025

Infused with amino peptides to firm and smooth the skin, niacinamide to nourish the skin barrier, and hyaluronic acid for a plumping touch, Olay’s lifting cream offers moisture with an extra dose of rejuvenating benefits. —Jenny Berg, Vogue, 4 Sep. 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