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

This body-boosting spray adds volume and shine, thanks to hyaluronic acid, and also prevents breakage with hydrolyzed rice protein. —Sarah Felbin, Allure, 26 Apr. 2026

Testers also appreciated the inclusion of good-for-skin ingredients like ceramides and hyaluronic acid, which helps support the skin barrier. —Brigitt Earley, Glamour, 24 Apr. 2026

When choosing a product, look for ingredients like hyaluronic acid, peptides or glycerin. —Lauren Jarvis-Gibson, Kansas City Star, 24 Apr. 2026

Look for formulas with ingredients like hyaluronic acid, peptides or glycerin. —Lauren Jarvis-Gibson, Miami Herald, 24 Apr. 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