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

Caffeine and hyaluronic acid team up to depuff and drench skin in moisture, while niacinamide and vitamin C help fade the look of dark circles. —Christa Joanna Lee, Allure, 3 Nov. 2025

Look for formulas that have hydrating ingredients like hyaluronic acid, glycerin, or ceramides. —Iona Brannon, Travel + Leisure, 2 Nov. 2025

Rice protein fortifies each strand to reduce breakage, while hyaluronic acid provides weightless hydration so hair stays soft without feeling heavy. —Conçetta Ciarlo, Vogue, 30 Oct. 2025

Olay Regenerist Micro-Sculpting Cream The cream is formulated with skin-nourishing ingredients, like niacinamide to brighten the skin and strengthen its moisture barrier, amino peptides to firm and sculpt, and hydrating hyaluronic acid to plump fine lines and wrinkles. —Alicia Geigel, Southern Living, 29 Oct. 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