alpha-hydroxy acid: meaning, definition, pronunciation and examples
C2 / Very Low Frequency / Domain-SpecificTechnical / Scientific / Commercial (Cosmetics)
Quick answer
What does “alpha-hydroxy acid” mean?
A type of chemical compound that occurs naturally in fruit and milk, used in cosmetics and dermatology to exfoliate the skin.
Audio
Pronunciation
Definition
Meaning and Definition
A type of chemical compound that occurs naturally in fruit and milk, used in cosmetics and dermatology to exfoliate the skin.
A carboxylic acid with a hydroxyl group attached to the carbon atom adjacent to the carboxyl group, known for promoting skin cell turnover and improving skin texture. Often referred to by its abbreviation, AHA.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or grammatical differences. Spelling and pronunciation follow standard UK/US conventions for Greek letters (e.g., 'alpha').
Connotations
Identical connotations in both varieties: scientific efficacy, skincare, chemical exfoliation.
Frequency
Equally low frequency in both varieties, confined to specialised domains of dermatology, chemistry, and cosmetic marketing.
Grammar
How to Use “alpha-hydroxy acid” in a Sentence
N of alpha-hydroxy acidAdj alpha-hydroxy acidalpha-hydroxy acid + N (e.g., alpha-hydroxy acid serum)V + alpha-hydroxy acid (e.g., apply alpha-hydroxy acid)Vocabulary
Collocations
Examples
Examples of “alpha-hydroxy acid” in a Sentence
verb
British English
- This formulation is not designed to alpha-hydroxy-acid the skin. (Non-standard, illustrative only)
American English
- You cannot 'alpha-hydroxy acid' your way to perfect skin. (Non-standard, illustrative only)
adverb
British English
- N/A
American English
- N/A
adjective
British English
- The alpha-hydroxy acid content is clearly labelled.
- She prefers an alpha-hydroxy acid-based toner.
American English
- The alpha-hydroxy acid concentration is 10%.
- Look for alpha-hydroxy acid products in the serum aisle.
Usage
Meaning in Context
Business
Used in marketing copy for skincare products, e.g., 'Our new cream is fortified with alpha-hydroxy acids.'
Academic
Used in biochemistry and dermatology papers discussing chemical properties or clinical efficacy.
Everyday
Rare. Might be used by informed consumers discussing skincare ingredients.
Technical
Precise term in cosmetic chemistry, dermatology formulations, and product labelling.
Vocabulary
Synonyms of “alpha-hydroxy acid”
Strong
Neutral
Weak
Vocabulary
Antonyms of “alpha-hydroxy acid”
Watch out
Common Mistakes When Using “alpha-hydroxy acid”
- Misspelling as 'alpha-hydoxy acid' (missing 'r').
- Incorrect hyphenation: 'alpha hydroxy-acid'.
- Using it as a countable noun without 's' for the class (e.g., 'This is an alpha-hydroxy acid' vs 'This product contains alpha-hydroxy acids').
FAQ
Frequently Asked Questions
No, it can irritate sensitive skin. A patch test and consultation with a dermatologist are recommended before first use.
AHAs (like glycolic acid) are water-soluble and work on the skin's surface. BHAs (like salicylic acid) are oil-soluble and can penetrate into pores.
Yes, but it is crucial to apply a high-SPF sunscreen afterwards, as AHAs increase photosensitivity, making skin more prone to sun damage.
Many, like glycolic acid (from sugar cane) and lactic acid (from milk), occur naturally, but they are often synthesized for cosmetic use to ensure purity and concentration.
A type of chemical compound that occurs naturally in fruit and milk, used in cosmetics and dermatology to exfoliate the skin.
Alpha-hydroxy acid is usually technical / scientific / commercial (cosmetics) in register.
Alpha-hydroxy acid: in British English it is pronounced /ˌælfə haɪˌdrɒksɪ ˈæsɪd/, and in American English it is pronounced /ˌælfə haɪˌdrɑːksi ˈæsɪd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. The term is purely technical.”
Learning
Memory Aids
Mnemonic
Think: ALPHA (first) HYDRoxy (has an -OH group) ACID. The 'alpha' tells you the hydroxyl group is on the first carbon next to the acid part.
Conceptual Metaphor
SKIN RENEWAL IS PEELING / TIME TRAVEL FOR SKIN (sends skin 'back in time' to a fresher state).
Practice
Quiz
What is the primary function of alpha-hydroxy acids in skincare?