anodized

/AE1 N OW0 D AY0 Z D/
verb
  1. 1

    To coat the surface of a metal electrolytically with an oxide, either as protection or decoration

adjective
  1. 1

    Of a metal object: having a surface layer of oxide, for decoration or protection, and formed via an electrolytic process.

    โ€œThis deluxe machine features anodized aluminum handles on all adjusting levers.โ€

Source: https://en.wiktionary.org/wiki/anodize, https://en.wiktionary.org/wiki/anodized