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 Swiss company knows hyaluronic acid: Inside its lab in Geneva, scientists work on fine-tuning the ingredient for injectable fillers and, now, for making skin care too. —Kara Nesvig, Allure, 24 Apr. 2025

It’s packed with strand-strengthening ingredients like hyaluronic acid and vegan collagen, and skips sulfates, parabens, and phthalates, which can be irritating to the scalp and hair. —Malia Griggs, Glamour, 24 Apr. 2025

Hydrating ingredients like hyaluronic acid, watermelon extract, and squalane add hydration for a glowy finish. —Conçetta Ciarlo, Vogue, 23 Apr. 2025

Like hyaluronic acid, glycerin is a humectant that draws water into the skin to keep it from drying out. —Jessica Kasparian, SELF, 18 Apr. 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