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

Pracaxi oil, andiroba oil, niacinamide, allantoin, hyaluronic acid, and an Amazonian tree extract give this antioxidant, reparative, anti-inflammatory, collagen-producing, wrinkle-filling, and elasticity-improving benefits. —Tamim Alnuweiri, InStyle, 7 Jan. 2026

The formula also includes hyaluronic acid and botanical extracts to help retain moisture while cleansing, leaving skin soft and balanced rather than stripped. —Iman Balagam, Vogue, 6 Jan. 2026

Urban Decay's foray comes in five sweat-and-water-resistant shades that nourish lashes with peptides, hyaluronic acid and castor oil. —Jackie Fields, PEOPLE, 5 Jan. 2026

So mascaras with nourishing ingredients like vitamin E and hyaluronic acid, and formulated without drying alcohol or irritants like parabens, will be your new go-tos. —Shalwah Evans, Glamour, 31 Dec. 2025

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