hydroxy

adjective

hy·​droxy hī-ˈdräk-sē How to pronounce hydroxy (audio)
: being or containing hydroxyl
especially : containing hydroxyl especially in place of hydrogen
usually used in combination
hydroxyacetic acid

Examples of hydroxy in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There’s a dynamic duo of chemical exfoliants, alpha-hydroxy and beta-hydroxy acids. Tamim Alnuweiri, InStyle, 9 Feb. 2026 Cetaphil Skin Activator Hydrating & Firming Cream The cream is formulated with mandelic acid (an alpha-hydroxy acid or AHA), which gently exfoliates the surface layer of skin to support skin cell turnover, while centella asiatica helps soothe and strengthen the natural skin barrier. Alicia Geigel, Southern Living, 6 Feb. 2026 Formulated in a Korean skin care lab, the facial serum is infused with alpha-hydroxy acids (AHAs), which gently lift dead skin cells and daily grime from your pores. Shani Cohen, Glamour, 12 Nov. 2025 Lactic acid, which is an alpha-hydroxy acid (AHA), is an ingredient found in many over-the-counter (OTC) skincare products. Sherri Gordon, Health, 14 Oct. 2025 See All Example Sentences for hydroxy

Word History

Etymology

International Scientific Vocabulary, from hydroxyl

First Known Use

1812, in the meaning defined above

Time Traveler
The first known use of hydroxy was in 1812

Browse Nearby Words

Cite this Entry

“Hydroxy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydroxy. Accessed 15 Feb. 2026.

Medical Definition

hydroxy

adjective
hy·​droxy hī-ˈdräk-sē How to pronounce hydroxy (audio)
: being or containing hydroxyl
especially : containing hydroxyl in place of hydrogen
often used in combination
hydroxybutyric acid
Last Updated: - Updated example sentences
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