adj.
  - relating to treatment or products intended to improve a person's appearance.
- affecting only the appearance of something:![]()  the reform package was merely a cosmetic exercise. 
n.
 
(
usu. cosmetics)
 a cosmetic preparation, especially for the face.
Derivative
  
  Etymology
  C17: from Fr. cosmétique, from Gk kosmētikos, from kosmein ‘arrange or adorn’, from kosmos ‘order or adornment’.