text: The word patina comes from the Italian patina (shallow layer of deposit on a surface), derived from the Latin patĭna (pan, shallow dish). Figuratively, patina can refer to any fading, darkening, or other signs of age, which are felt to be natural or unavoidable (or both).
  The chemical process by which a patina forms or is deliberately induced is called patination, and a work of art coated by a patina is said to be patinated.