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 formula contains hyaluronic acid and works to hydrate the hair and scalp, and reduce frizz. — Reece Andavolgyi, InStyle, 6 Aug. 2026

Ingredients once discussed only by dermatologists and cosmetic chemists now dominate social media feeds, while hyaluronic acid, niacinamide, peptides and ceramides have become part of everyday conversation. — Kate Hardcastle, Forbes.com, 6 Aug. 2026

The formula texture is thicker than a toner and reminded me of my hyaluronic acid serums. — Jessie Quinn, StyleCaster, 5 Aug. 2026

LipLift is powered by the brand’s proprietary Hyaluron Peptide-6 BioFill, a topical volumizing technology formulated with six advanced biomimetic peptides, hyaluronic acid oil, poly-hyaluronic acid filling spheres and bioidentical skin lipids. — Kathryn Hopkins, Footwear News, 4 Aug. 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