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

Perhaps a hyaluronic acid serum or hydrating face mist could also be helpful supplements. — Rio Viera-Newton, Vogue, 23 July 2026

Niacinamide and hyaluronic acid, on the other hand, work in harmony to hydrate and boost moisture retention, and the antioxidant-rich vitamin E helps neutralize free radicals caused by UV rays. — Alicia Geigel, Southern Living, 23 July 2026

The lightweight skin care pick is formulated with hyaluronic acid and niacinamide to plump, smooth, and brighten your complexion. — Kyra Surgent, InStyle, 22 July 2026

It’s made with hyaluronic acid and argan oil to provide up to 24 hours of hydration, per the brand, and stop the skin from looking cakey, dull, or dry. — Alyssa Grabinski, PEOPLE, 21 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