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

Its rich formula packs 12 oils and butters, squalane, and hyaluronic acid for hydration. —Jessica Kasparian, SELF, 21 Aug. 2025

With a combination of ceramides, hyaluronic acid, and niacinamide, the CeraVe Eye Repair Cream’s hydrating formula is designed to depuff and reduce dark circles while leaving your eyes feeling refreshed and awake. —Caley Sturgill, Southern Living, 17 Aug. 2025

The lotion is rich in anti-aging ingredients, such as collagen to add plumpness and hyaluronic acid to boost hydration and radiance. —Clara McMahon, People.com, 15 Aug. 2025

The delightfully retro brand delivers with a formula packed with two sizes of gold mica glitter—one pearly and subtle, the other bold and light-catching—plus skin-loving ingredients like argan oil, peptides, and hyaluronic acid. —Annie Blackman, Allure, 15 Aug. 2025

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