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

So, rather than ponder if beta-glucan is better than hyaluronic acid, harness both of their attributes for a short and long-term moisture solution. —Morgan Fargo, Vogue, 22 Dec. 2025

This Korean face mask is packed with collagen (to soften lines), hyaluronic acid (to hydrate), and niacinamide (to even out skin tone and discoloration). —Alanna Martine Kilkeary, Glamour, 22 Dec. 2025

Moisturizing glycerin and hydrating hyaluronic acid are the stars, while skin-strengthening peptides support healing, and collagen and elastin help keep skin supple. —Jacqueline Kilikita, Refinery29, 19 Dec. 2025

Featuring a blend of cocoa and shea butter to moisturize, hyaluronic acid to minimize fine lines and wrinkles, and sunflower seed oil to promote radiant skin, this moisturizer gives skin proper TLC in seconds. —Tatayana Yomary, Essence, 19 Dec. 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