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

Moisture-sealing babassu oil smooths the hair cuticle, nourishing murumuru butter replenishes dry strands, and hyaluronic acid provides lightweight hydration without weighing hair down. — Christa Joanna Lee, Allure, 19 June 2026

The 68-year-old actress wore Laura Geller's Spackle Primer, which is infused with hyaluronic acid and glycerin to hydrate and smooth skin while creating an ideal base for makeup. — Brittany Anas, PEOPLE, 18 June 2026

LilyAna’s version is also packed with hyaluronic acid and vitamin E for deep penetrating hydration that combats any of the infamous drying side effects associated with the ingredient. — Tamim Alnuweiri, InStyle, 16 June 2026

If collagen loss is one of the key biological drivers of aging, hyaluronic acid loss is one of the key visual contributors. — Ellie Davis, Vogue, 11 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