cosmetic vs emulsion

cosmetic

noun
  • A feature existing only on the surface. 

  • An intangible influence that improves the overall perception of some thing or situation. 

  • Any substances applied to enhance the external color or texture of the skin, e.g. lipstick, eyeshadow, eyeliner; makeup. 

adj
  • External or superficial; pertaining only to the surface or appearance of something. 

  • Imparting or improving beauty, particularly the beauty of the complexion. 

emulsion

noun
  • The coating of photosensitive silver halide grains in a thin gelatine layer on a photographic film. 

  • A stable suspension of small droplets of one liquid in another with which it is immiscible. 

  • A colloid in which both phases are liquid. 

verb
  • To paint with emulsion paint. 

How often have the words cosmetic and emulsion occurred in a corpus of books? (source: Google Ngram Viewer )