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 powerhouse Korean skin care product features a blend of hyaluronic acid, shea butter and collagen to plump and soften the skin. —Alanna Martine Kilkeary, Glamour, 26 Sep. 2025

It’s made with hydrating ingredients like hyaluronic acid and vitamin E, and it can even be paired with your favorite lip balm or gloss — without staining the applicator — for an extra boost of moisture. —Maggie Horton, PEOPLE, 26 Sep. 2025

Inside, 10 different types of hyaluronic acid work together to drench your skin in hydration—plumping it up right away while keeping it moisturized and bouncy for hours. —Sarah Han, Allure, 25 Sep. 2025

The skin-loving formulation is fast-absorbing and infused with ingredients that promote deep hydration including squalane, snow mushroom fungi, seaweed extracts, hyaluronic acid, and niacinamide. —Maria Conti, Better Homes & Gardens, 25 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