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

In addition to these benefits of hyaluronic acid, the ingredient can address fine lines and wrinkles. —Jessie Quinn, StyleCaster, 15 May 2026

The concealer’s formula is infused with a mix of hyaluronic acid and squalane, which keeps the delicate skin under your eyes hydrated. —Izzy Baskette, PEOPLE, 15 May 2026

That’s thanks to a blend of seven peptides that work alongside nicainamide, allatoin, and mixed-weight hyaluronic acid. —Beatrice Zocchi, Vogue, 11 May 2026

It’s also stacked with reliable tone-evening ingredients like tranexamic acid, niacinamide, and arbutin, plus supportive ingredients like ceramides, panthenol, and hyaluronic acid to keep skin hydrated and balanced. —Christa Joanna Lee, Allure, 9 May 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