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

It’s formulated with hyaluronic acid, peptides, and niacinamide to promote hydration, increase collagen production, and visibly brighten skin. — Melony Forcier, InStyle, 10 Sep. 2026

Also, Nécessaire the Lip Balm is made with soothing skin care ingredients such as niacinamide, ceramides, hyaluronic acid, and shea butter; it’s approved for eczema-prone skin and even has a touch of (natural) mint to keep you feeling fresh. — Lindy Segal, Glamour, 8 Sep. 2026

Beyond multi-weight hyaluronic acid, panthenol and allantoin offer additional skin-soothing benefits. — Kiana Murden, Vogue, 8 Sep. 2026

That copper complex is also responsible for the formula’s distinctive blue hue, while glycerin and two forms of hyaluronic acid draw in moisture for an immediate plumping effect. — Christa Joanna Lee, Allure, 6 Sep. 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