metallochrome

from The Century Dictionary.

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

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun 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.