alpha hydroxy acid

noun

Definition of alpha hydroxy acid

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

First Known Use of alpha hydroxy acid

1899


Medical Dictionary

alpha hydroxy acid

noun
variants: also alpha hydroxy

medical Definition of alpha hydroxy acid

: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

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).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a ram's-horn trumpet used in Judaism

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Bee Cubed

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!