Definition of emulsion noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪˈmʌlʃn//
    ; NAmE NAmE//ɪˈmʌlʃn//
    [countable, uncountable]
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  1. 1any mixture of liquids that do not normally mix together, such as oil and water Reduce the heat until the mixture becomes a thick butter-wine emulsion. The test solutions were prepared in emulsion form.
  2. 2(also emulsion paint) (British English) a type of paint used on walls and ceilings that dries without leaving a shiny surface They gave the walls a coat of white emulsion.
  3. 3(specialist) a substance on the surface of photographic film that makes it sensitive to light photographic/film emulsion
  4. Word Originearly 17th cent. (denoting a milky liquid made by crushing almonds in water): from modern Latin emulsio(n-), from the verb emulgere ‘milk out’, from e- (variant of ex-) ‘out’ + mulgere ‘to milk’.
See the Oxford Advanced American Dictionary entry: emulsion