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

In addition to strengthening the skin, the firming complex also helps to hydrate and plump the skin with hibiscus peptides, collage, and hyaluronic acid. —Alicia Geigel, Southern Living, 2 Apr. 2026

Among its 10 other ingredients are glycerin, a humectant that draws moisture to the skin and plumping hyaluronic acid. —Jackie Fields, PEOPLE, 1 Apr. 2026

Then, there’s glycerin and hyaluronic acid to maintain skin’s moisture levels and stave off dryness. —Vogue, 31 Mar. 2026

Formulated with organic snail secretion filtrate and hyaluronic acid, this serum soothes stressed skin and significantly boosts moisture with fast-acting hydration. —Bestreviews, Chicago Tribune, 30 Mar. 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