emulsion emulsion /ɪˈmʌlʃən/

noun

1. A light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin  ( emulsion , photographic emulsion )
   a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin
   
   
2. (chemistry) a colloid in which both phases are liquids  ( emulsion )
   (chemistry) a colloid in which both phases are liquids
    An oil-in-water emulsion
   an oil-in-water emulsion