metallochrome

Century Dictionary and Cyclopedia

1. n. A beautiful prismatic tinting imparted by electrolytic action to polished steel plates by depositing on them a thin film of oxid of lead.

Wiktionary

1. n. A colouring produced by the deposition of some metallic compound; specifically, the prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity.

GNU Webster's 1913

1. n. A coloring produced by the deposition of some metallic compound; specifically, the prismatic tints produced by depositing a film of peroxide of lead on polished steel by electricity.