hydroxy

adjective

hy·​droxy hī-ˈdräk-sē 

: 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

For age spots: cell regeneration Look for products with vitamin C, niacinamide, and kojic and hydroxy acids. —Vicky Vera, Glamour, 23 Jan. 2025

Niacinamide serum to control oil production and reduce pores and redness Alpha hydroxy acids (AHAs) to help exfoliate the surface layer of dry skin Beta hydroxy acids (BHAs) to treat oily and acne-prone skin and penetrate deeper into pores. —Anna Giorgi, Verywell Health, 22 Jan. 2025

Toners usually include hydroxy acids, like salicylic, glycolic, or lactic acids. —Amanda Svachula, Health, 27 Dec. 2024

The brand’s newest anti-aging serum is created with a slew of peptides plus niacinamide and poly hydroxy acids that work together to smooth existing fine lines. —Claire Sullivan, WWD, 31 July 2024

Word History

Etymology

International Scientific Vocabulary, from hydroxyl

First Known Use

1812, in the meaning defined above

Phrases Containing hydroxy

• alpha-hydroxy acid
• beta hydroxy acid

Medical Definition

hydroxy

adjective

hy·​droxy hī-ˈdräk-sē 

: being or containing hydroxyl

especially : containing hydroxyl in place of hydrogen

—often used in combination

hydroxybutyric acid