emulsion

noun

• 1a fine dispersion of minute droplets of one liquid in another in which it is not soluble or miscible: oil beaten to an emulsion with a half tablespoonful of vinegar
• a fine dispersion of one liquid or puréed food substance in another:ravioli with pea and ginger emulsion

• 2 (also emulsion paint) [mass noun] British a type of paint used for walls, consisting of pigment bound in a synthetic resin which forms an emulsion with water: three coats of white emulsion
• a light-sensitive coating for photographic films and plates, containing crystals of a silver compound dispersed in a medium such as gelatin.

verb

• paint with emulsion: if the lining paper is not opaque, the wall should also be emulsioned