The Collaborative International Dictionary
Acierage
Acierage \Ac`i*er*age\, n. [F. aci['e]rage, fr. acier steel.] The process of coating the surface of a metal plate (as a stereotype plate) with steellike iron by means of voltaic electricity; steeling.
Wiktionary
acierage
n. (context historical English) The process of electroplating a copper engraving with iron or steel.
Wikipedia
Acierage
Category:Metal plating