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

The formula has hyaluronic acid in it, so lips will feel hydrated all day long. — Anna Traver, InStyle, 31 Oct. 2026

Glycerin and hyaluronic acid help lock in hydration and protect the skin barrier, while niacinamide and vitamin E even tone and boost radiance. — Madison San Miguel, Allure, 30 Oct. 2026

Look for ingredients like glycerin, cocoa or shea butter, hyaluronic acid and squalane. — Maggie Ryan, Flow Space, 30 Oct. 2026

It’s also made with low molecular-weight hyaluronic acid for plumping and film-forming magnesium salts. — Jenny Berg, Vogue, 30 Oct. 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