Emulsion

Merriam-Webster Online Dictionary
emulsion (noun)
1.
a) a system (as fat in milk) consisting of a liquid dispersed with or without an in an immiscible liquid usually in droplets of larger than colloidal size - emulsifier
b) the state of such a system
2.
- suspension , especially a suspension of a sensitive silver salt or a mixture of silver halides in a viscous medium (as a gelatin solution) forming a coating on photographic plates, film, or paper
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