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

Use a primer with ingredients like hyaluronic acid and ceramides to keep dry skin or flakiness at bay. — Alanna Martine Kilkeary, Glamour, 3 July 2026

Pre-soaked toner pads are infused with active ingredients to help smooth skin and enhance hydration, while the anti-aging moisturizer combines NAD+ and hyaluronic acid for a firmer, more radiant look. — ABC News, 2 July 2026

If your skin needs a hydration boost, reach for the brand's Hyaluronic Moisture formula with hyaluronic acid and snow mushroom to quench its thirst. — Jackie Fields, PEOPLE, 1 July 2026

Other emerging supplements include ashwagandha, elderberry, collagen, hyaluronic acid, probiotics and prebiotics, according to the research. — Angelica Stabile, FOXNews.com, 30 June 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