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

Best described as a lip gloss stick, this assortment of high-shine jellies delivers high-octane, non-sticky shine with the nourishment of a balm via ingredients like hyaluronic acid, vitamin E, and mango oils. —Kiana Murden, Vogue, 7 Feb. 2025

And with so many blurring powders now offering skin-care-forward formulas—think ingredients like hyaluronic acid and glycerin—creating an airbrushed and hydrated canvas go hand in hand. —Daisy Maldonado, Allure, 6 Feb. 2025

The Ordinary Hyaluronic Acid 2% + B5 Serum $10 at Amazon The hyaluronic acid serum is also a favorite for PEOPLE Shopping testers. —Clara McMahon, People.com, 5 Feb. 2025

Of course, the hydration is phenomenal, too, with ingredients like hyaluronic acid providing long-lasting moisture, passionflower seed oil to soothe stressed skin, and bacuri butter that replenishes the skin barrier by restoring essential fatty and amino acids. —Alexandra Folino, Glamour, 4 Feb. 2025

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