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

On the skin-care front, hyaluronic acid and glycerin help draw in and lock in moisture, while soothing tiger grass helps support the skin barrier and calm the look of irritation. — Deanna Pai, Vogue, 10 July 2026

While there, the nurse practitioner persuaded her to inject her nose with hyaluronic acid, but the injection ended up blocking an important artery, affecting blood flow to the eyes, according to Campos. — Michelle Marchante july 10, Miami Herald, 10 July 2026

Thanks to ingredients like retinol and hyaluronic acid, this pick from Neutrogena is a fan favorite for treating crow’s-feet and reducing the appearance of eye wrinkles. — Daley Quinn, Glamour, 9 July 2026

The balm uses a peptide complex that not only smoothes and hydrates skin, but also contains collagen and hyaluronic acid to boost your lip’s volume and reduce fine lines over time. — Rylee Johnston, PEOPLE, 9 July 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