glycolic acid

noun

gly·​col·​ic acid (ˌ)glī-ˈkä-lik- 

variants or glycollic acid

: an alpha hydroxy acid C₂H₄O₃ found especially in unripe grapes and sugar beets and used especially in textile and leather processing and in skin-care treatments especially as an exfoliant

Examples of glycolic acid in a Sentence

Recent Examples on the Web

These pre-soaked exfoliating pads gently slough the top layer of skin to reveal a brighter, smoother complexion, thanks to a 10% dose of a glycolic acid complex. —Lily Wohlner, Allure, 4 Aug. 2025

Meanwhile, lactic and glycolic acid help to fight pore-expanding buildup and slough away dead skin cells. —Ariel Wodarcyk, Glamour, 15 May 2025

The pointed applicator offers precise application, ensuring its blend of glycolic acid, BHAs, and PHAs can eliminate flaking and reduce surface oils. —Conçetta Ciarlo, Vogue, 1 Aug. 2025

From gentle, hydrating PHAs to more potent blends with salicylic or glycolic acid, there’s truly a pick for everyone. —Christa Joanna Lee, Allure, 3 July 2025

Word History

Etymology

International Scientific Vocabulary glycol + -ic entry 1

First Known Use

1852, in the meaning defined above

Rhymes for glycolic acid

• antacid
• placid

Medical Definition

glycolic acid

noun

variants also glycollic acid

: an alpha hydroxy acid C₂H₄O₃ that is oxidized to glyoxylic acid in photosynthesis, is used as an agent to produce chemical peels in cutaneous rejuvenation treatments, and is the major toxic metabolite in ethylene glycol poisoning

called also hydroxyacetic acid