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

Every skin care-makeup hybrid is formulated with serum-strength actives like vitamin C, hyaluronic acid, peptides and ceramides to hydrate and repair. —Tory Johnson, ABC News, 12 Mar. 2026

The baked powder formula is infused with hydrating hyaluronic acid and white rose extract to soothe and plump the skin, plus mica—a soft-focus powder that diffuses the look of texture. —Lily Wohlner, Allure, 11 Mar. 2026

Along with pro-retinol, the formula includes hyaluronic acid, which helps the skin retain moisture, and vitamin C, which can reduce dark spots. —Isabel Bekele, InStyle, 11 Mar. 2026

As for the formula itself, marshmallow root extract helps with detangling, hyaluronic acid delivers hydration, and linseed extract keeps your style locked in place. —Conçetta Ciarlo, Vogue, 10 Mar. 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