Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

alpha hydroxy acid

noun

Definition of alpha hydroxy acid

  1. :  any of various carboxylic acids with a hydroxyl group attached at the alpha position; specifically :  one (as malic acid or lactic acid) that occurs in natural products (as fruits, sugarcane, or yogurt) and is used in cosmetics for its exfoliating effect on the surface layer of skin —called also AHA



1899

First Known Use of alpha hydroxy acid

1899


Medical Dictionary

alpha hydroxy acid

noun

Medical Definition of alpha hydroxy acid

  1. :  any of various carboxylic acids with a hydroxyl group attached at the alpha position; specifically :  one (as glycolic acid, malic acid, or lactic acid) that occurs in natural products (as fruits, sugarcane, or yogurt) and is used in cosmetics for its exfoliating effect on the surface layer of the skin—called also AHA



Variants of alpha hydroxy acid

also alpha hydroxy

Learn More about alpha hydroxy acid


Seen and Heard

What made you want to look up alpha hydroxy acid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by grandiloquent style

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe reduce perplex disapprove
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ