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

Studies show that this heritage ingredient and its compounds boast potent anti-aging properties, inclusive of collagen and hyaluronic acid stimulation, antioxidant and anti-inflammatory effects, and wound healing benefits. —Emily Orofino, Vogue, 19 Feb. 2026

This milky perfume is like a lightweight, concentrated lotion infused with hyaluronic acid that can be worn as perfume on its own or layered with scents. —Reece Andavolgyi, InStyle, 16 Feb. 2026

To round things out, many formulas include multitaskers like niacinamide and hyaluronic acid for hydration and brightening, plus gentler exfoliants—think PHA or low-dose AHA/BHA blends, so skin gets the benefits of exfoliation without the irritation. —Christa Joanna Lee, Allure, 15 Feb. 2026

Last month, the German tabloid Bild reported that some male ski jumpers were injecting hyaluronic acid — a sugar molecule that gets bigger through water absorption — into their genitals or wearing a condom-like covering before they are sized for a heavily regulated jumping suit. —John Cherwa, Los Angeles Times, 10 Feb. 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