emulsion

noun

• 1a fine dispersion of minute droplets of one liquid in another in which it is not soluble or miscible.
• a fine dispersion of one liquid or puréed food substance in another:ravioli with pea and ginger emulsion

• 2 (also emulsion paint) a water-based paint used for walls.
• a light-sensitive coating for photographic films and plates, containing crystals of a silver compound dispersed in a medium such as gelatin.