What is the meaning of Orichalcum?

A valuable yellow metal known to the Ancient Greeks and Romans; now sometimes interpreted as referring to a natural alloy of gold and copper, and sometimes treated as a mythical substance.

yellow copper ore, or an alloy of gold and copper

a mythical mineral

brass (or brass objects)

inflection of orichalcus:

  1. nominative/accusative/vocative neuter singular
  2. accusative masculine singular

nominative/accusative/vocative neuter singular

accusative masculine singular

Source: wiktionary.org