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 product’s ceramide inclusion is also joined by skin care’s workhorse hyaluronic acid, antioxidant-rich vitamins C and E, plus sea buckthorn, which aids with brightening and thereby remedies dark spots. — Stacia Datskovska, Footwear News, 17 July 2026

Both formulas feature zinc oxide, niacinamide, and hyaluronic acid to provide physical sun protection, reduce redness and calm the complexion, and hydrate the skin. — Jessie Quinn, StyleCaster, 17 July 2026

At a minimum, your routine should include a retinol at night, vitamin C serum in the morning, and a good moisturizer with hyaluronic acid. — Maggie Ryan, Flow Space, 16 July 2026

Probiotics balance the scalp biome, biotin is a hero hair growth ingredient, salicylic acid helps exfoliate away oil and dead skin, hyaluronic acid invites moisture, and a range of botanical antioxidants offer a soothing effect. — Essence Wiley, InStyle, 15 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