Meaning & use
emulsion
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A mixture of two liquids that don't normally combine, such as oil and water, in which tiny droplets of one are dispersed in the other.
See it in a sentence
Mayonnaise is an emulsion of oil, egg yolk, and vinegar.
The chemist studied how the emulsion separated over time.
A note on using this word
Also refers to the light-sensitive coating on photographic film, a distinct second meaning worth knowing.
Another way to use it
2. noun
A light-sensitive coating on photographic film or paper.
The old film's emulsion had begun to crack with age.
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