hyaluronic acid

noun

hy·​al·​uron·​ic acid ˌhī(-ə)l-yu̇-ˈrä-nik How to pronounce hyaluronic acid (audio)
: 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

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In South Korea, Letybo often turns up as part of a three-hour combination session that might fold in filler, hyaluronic acid skin boosters and a facial, Kim told Allure. — Hanna Wickes, Sacbee.com, 26 Oct. 2026 And because acne-prone skin still needs moisture, the formula pairs two forms of hyaluronic acid with soothing panthenol to replenish hydration and prevent irritation. — Christa Joanna Lee, Allure, 21 Oct. 2026 And while the clay helps keep excess oil in check, hydrating ingredients like hyaluronic acid, vitamin E, bark extract, and castor seed oil nourish the skin for a smoother, plumper appearance. — Mariana Best, PEOPLE, 21 Oct. 2026 Flax seed extract, another key ingredient in the formula, boosts the skin’s natural hyaluronic acid levels to keep it hydrated. — Jenny Berg, Vogue, 14 Oct. 2026 See All Example Sentences for hyaluronic acid

Word History

Etymology

International Scientific Vocabulary

First Known Use

1934, in the meaning defined above

Time Traveler
The first known use of hyaluronic acid was in 1934

Rhymes for hyaluronic acid

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Browse Nearby Words

hyalotekite
hyaluronic acid
hyaluronidase
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Cite this Entry

“Hyaluronic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hyaluronic%20acid. Accessed 29 Oct. 2026.

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Medical Definition

hyaluronic acid

noun
hy·​al·​uron·​ic acid ˌhīl-yu̇-ˌrän-ik- How to pronounce hyaluronic acid (audio) ˌhī-əl-yu̇- How to pronounce hyaluronic acid (audio)
: 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

More from Merriam-Webster on hyaluronic acid

Britannica.com: Encyclopedia article about hyaluronic acid

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