Definition of patination noun from the Oxford Advanced Learner's Dictionary

 

patination

 noun
noun
BrE BrE//ˌpætɪˈneɪʃn//
 
; NAmE NAmE//ˌpætɪˈneɪʃn//
 
[uncountable, countable](specialist)
 
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a shiny layer on the surface of metal, wood, etc.; the process of covering something with a shiny layer Japanese metalworkers have made the skill of patination into an art form.
See the Oxford Advanced American Dictionary entry: patination