emulsifier

noun
UK /ɪˈmʌlsɪfaɪə/
US /ɪˈmʌlsəˌfaɪər/

An emulsifier is a thing that helps two liquids that normally don't mix, like oil and water, blend together.

Egg yolk is a natural emulsifier that helps make mayonnaise smooth.


OTHER MEANINGS

2. A substance added to food to keep mixtures like sauces and dressings from separating.

The label lists soy lecithin as an emulsifier in the chocolate.

3. A chemical that helps cosmetics and creams combine water and oil ingredients.

This lotion uses an emulsifier to keep its oils evenly spread.

4. Any agent used in industry to create stable mixtures of immiscible liquids.

Paint makers add an emulsifier so pigments mix evenly with the liquid.